Conservation-restoration of cultural heritage

For conservation of biodiversity, environment, and natural resources, see Conservation movement, Conservation biology, and Environmental science.

Removal of adherent surface deposits by physical chemical means (by cotton swab) at Church of Suceviţa Monastery, burial chamber, in Romania, Suceava

Conservation of Horses of Saint Mark, (Venice)

The conservation-restoration of cultural heritage focuses on protection and care of tangible cultural heritage, including artworks, architecture, archaeology, and museum collections. Conservation activities include preventive conservation, examination, documentation, research, treatment, and education. This field is closely allied with conservation science, curators and registrars.

Definition

A restorer at work

Conservation of cultural heritage involves protection and restoration using "any methods that prove effective in keeping that property in as close to its original condition as possible for as long as possible." Conservation of cultural heritage is often associated with art collections and museums and involves collection care and management through tracking, examination, documentation, exhibition, storage, preventative conservation, and restoration.

The scope has widened from art conservation, involving protection and care of artwork and architecture, to conservation of cultural heritage, also including protection and care of a broad set of other cultural and historical works. Conservation of cultural heritage would more accurately be described as a type of ethical stewardship.

Conservation of cultural heritage applies simple ethical guidelines:

• Minimal intervention;
• Appropriate materials and reversible methods;
• Full documentation of all work undertaken.

Often there are compromises between preserving appearance, maintaining original design and material properties, and ability to reverse changes. Reversibility is now emphasized so as to reduce problems with future treatment, investigation, and use.

In order for conservators to decide upon an appropriate conservation strategy and apply their professional expertise accordingly, they must take into account views of the stakeholder, the values and meaning of the work, and the physical needs of the material.

Cesare Brandi in his Theory of Restoration, describes restoration as "the methodological moment in which the work of art is appreciated in its material form and in its historical and aesthetic duality, with a view to transmitting it to the future".

History

Key dates

Main article: List of dates in the history of art conservation

Some consider the tradition of conservation of cultural heritage in Europe to have begun in 1565 with the restoration of the Sistine Chapel frescoes, but more ancient examples include the work of Cassiodorus.

Brief history

An early video showing some activities in a conservation laboratory at the Rijksmuseum

A temporary windowed partition along restoration work area in the cloister of the Church of St. Trophime, Arles

The care of cultural heritage has a long history, one that was primarily aimed at fixing and mending objects for their continued use and aesthetic enjoyment. Until the early 20th century, artists were normally the ones called upon to repair damaged artworks. During the 19th century, however, the fields of science and art became increasingly intertwined as scientists such as Michael Faraday began to study the damaging effects of the environment to works of art. Louis Pasteur carried out scientific analysis on paint as well. However, perhaps the first organized attempt to apply a theoretical framework to the conservation of cultural heritage came with the founding in the United Kingdom of the Society for the Protection of Ancient Buildings in 1877. The society was founded by William Morris and Philip Webb, both of whom were deeply influenced by the writings of John Ruskin. During the same period, a French movement with similar aims was being developed under the direction of Eugène Viollet-le-Duc, an architect and theorist, famous for his restorations of medieval buildings.

Since 1998, Harvard University wraps some of the valuable statues on its campus, such as this "Chinese stele", with waterproof covers every winter, in order to protect them from erosion caused by acid rain.

Conservation of cultural heritage as a distinct field of study initially developed in Germany, where in 1888 Friedrich Rathgen became the first chemist to be employed by a Museum, the Koniglichen Museen, Berlin (Royal Museums of Berlin). He not only developed a scientific approach to the care of objects in the collections, but disseminated this approach by publishing a Handbook of Conservation in 1898. The early development of conservation of cultural heritage in any area of the world is usually linked to the creation of positions for chemists within museums. In the United Kingdom, pioneering research into painting materials and conservation, ceramics, and stone conservation was conducted by Arthur Pillans Laurie, academic chemist and Principal of Heriot-Watt University from 1900. Laurie's interests were fostered by William Holman Hunt. In 1924 the chemist Harold Plenderleith began to work at the British Museum with Dr. Alexander Scott in the newly created Department of Scientific and Industrial Research, thus giving birth to the conservation profession in the UK. This department was created by the museum to address the deteriorating condition of objects in the collection, damages which were a result of their being stored in the London Underground tunnels during the First World War. The creation of this department moved the focus for the development of conservation theory and practice from Germany to Britain, and made the latter a prime force in this fledgling field. In 1956 Plenderleith wrote a significant handbook called The Conservation of Antiquities and Works of Art, which supplanted Rathgen's earlier tome and set new standards for the development of art and conservation science.

In the United States, the development of conservation of cultural heritage can be traced to the Fogg Art Museum, and Edward Waldo Forbes, its director from 1909 to 1944. He encouraged technical investigation, and was Chairman of the Advisory Committee for the first technical journal, Technical Studies in the Field of the Fine Arts, published by the Fogg from 1932 to 1942. Importantly he also brought onto the museum staff chemists. Rutherford John Gettens was the first of usch in the US to be permanently employed by an art museum. He worked with George L. Stout, the founder and first editor of Technical Studies. Gettens and Stout co-authored Painting Materials: A Short Encyclopaedia in 1942, reprinted in 1966. This compendium is still cited regularly. Only a few dates and descriptions in Gettens' and Stout's book are now outdated.

George T. Oliver, of Oliver Brothers Art Restoration and Art Conservation-Boston (Est. 1850 in New York City) invented the vacuum hot table for relining paintings in 1920’s; he filed a patent for the table in 1937. Taylor's prototype table, which he designed and constructed, is still in operation. Oliver Brothers is believed to be the first and the oldest continuously operating art restoration company in the United States.

The focus of conservation development then accelerated in Britain and America, and it was in Britain that the first International Conservation Organisations developed. The International Institute for Conservation of Historic and Artistic Works (IIC) was incorporated under British law in 1950 as "a permanent organization to co-ordinate and improve the knowledge, methods, and working standards needed to protect and preserve precious materials of all kinds." The rapid growth of conservation professional organizations, publications, journals, newsletters, both internationally and in localities, has spearheaded the development of the conservation profession, both practically and theoretically. Art historians and theorists such as Cesare Brandi have also played a significant role in developing conservation science theory. In recent years ethical concerns have been at the forefront of developments in conservation. Most significantly has been the idea of Preventive conservation. This concept is based in part on the pioneering work by Garry Thomson CBE, and his book the Museum Environment, first published in 1978. Thomson was associated with the National Gallery (London), it was here that he established a set of guidelines or environmental controls for the best conditions in which objects could be stored and displayed within the Museum Environment. Although his exact guidelines are no longer rigidly followed they did inspire this field of conservation.

Ethics

The conservator's work is guided by ethical standards. These take the form of applied ethics. Ethical standards have been established across the world, and national and international ethical guidelines have been written. One such example is:

• American Institute for Conservation Code of Ethics and Guidelines for Practice

Conservation OnLine's Ethical issues in conservation provides a number of articles on ethical issues in conservation; example of codes of ethics and guidelines for professional conduct in conservation and allied fields; and charters and treaties pertaining to ethical issues involving the preservation of cultural property.

As well as standards of practice conservators deal with wider ethical concerns, such as the debates as to whether all art is worth preserving.

Castle gate of Krnov before (2001) and after (2009) restoration

Preserved historical quarter in Beirut Central District

Caring for cultural heritage

Collections care

Main article: Collections care

Many cultural works are sensitive to environmental conditions such as temperature, humidity and exposure to light and ultraviolet light. They must be protected in a controlled environment where such variables are maintained within a range of damage-limiting levels. Shielding from sunlight of artifacts such as watercolour paintings for example is usually necessary to prevent fading of pigments.

Collections care is an important element of museum policy. It is an essential responsibility of members of the museum profession to create and maintain a protective environment for the collections in their care, whether in store, on display, or in transit. A museum should carefully monitor the condition of collections to determine when an artifact requires conservation work and the services of a qualified conservator.

Work of preventive conservation in a rock wall with prehistoric paintings at the Serra da Capivara National Park. The work consists of filling the cracks to prevent the fragmentation of the wall.

Interventive conservation

Furniture conservation – Re-glueing loose element of solid nut marriage chest (probably Italy, 19th century)

Interventive Conservation refers to any act by a conservator that involves a direct interaction between the conservator and the cultural material. These interventive treatments could involve cleaning, stabilizing, repair, or even replacement of parts of the original object. It is essential that the conservator should fully justify any such work. Complete documentation of the work carried out before, during, and after the treatment rules out chances of later doubts.

The principal goal of a cultural conservator is to nullify or at least reduce the rate of deterioration of an object. This can be achieved through either non-interventive or interventive methodologies. Interventive methodologies include all those actions taken by the conservator to directly intervene with the material fabric of the object. Such actions include surface cleaning such as varnish removal, or consolidation such as securing flaking paint. Such interventive actions are carried out for a variety of reasons including aesthetic choices, stabilization needs for structural integrity, or for cultural requirements for intangible continuity.

One of the guiding principles of conservation of cultural heritage has traditionally been the idea of reversibility, that all interventions with the object should be fully reversible and that the object should be able to be returned to the state in which it was prior to the conservator's intervention. Although this concept remains a guiding principle of the profession, it has been widely critiqued within the conservation profession and is now considered by many to be "a fuzzy concept." Another important principle of conservation is that all alterations should be well documented and should be clearly distinguishable from the original object.

An example of a highly publicized interventive conservation effort would be the conservation work conducted on the Sistine Chapel.

The conservation laboratory

The Lunder Conservation Center. Conservation staff for both the Smithsonian American Art Museum and the National Portrait Gallery are visible to the public through floor-to-ceiling glass walls that allow visitors to see firsthand all the techniques that conservators use to examine, treat and preserve artworks within a functioning conservation Laboratory.

Conservators routinely use chemical and scientific analysis for the examination and treatment of cultural works. The modern conservation laboratory uses equipment such as microscopes, spectrometers, and various x-ray regime instruments to better understand objects and their components. The data thus collected helps in deciding the conservation treatments to be provided to the object.

Country by country look

United States

Heritage Preservation, in partnership with the Institute of Museum and Library Services, a U.S. federal agency, produced The Heritage Health Index. The results of this work was the report A Public Trust at Risk: The Heritage Health Index Report on the State of America's Collections, which was published in December 2005 and concluded that immediate action is needed to prevent the loss of 190 million artifacts that are in need of conservation treatment. The report made four recommendations:

• Institutions must give priority to providing safe conditions for the collections they hold in trust.
• Every collecting institution must develop an emergency plan to protect its collections and train staff to carry it out.
• Every institution must assign responsibility for caring for collections to members of its staff.
• Individuals at all levels of government and in the private sector must assume responsibility for providing the support that will allow these collections to survive

United Kingdom

Conservation in Progress note, Victoria and Albert Museum, (2014)

In October 2006, the Department for Culture, Media and Sport, a governmental department, authored a document: "Understanding the Future: Priorities for England's Museums". This document was based on several years of consultation aimed to lay out the government's priorities for museums in the 21st century.

The document listed the following as priorities for the next decade:

1. Museums will fulfil their potential as learning resources (pp 7–10).
   • Museums will be embedded into the delivery of education in every school in the country.
   • Understanding of the effectiveness of museum education will be improved further and best practice built into education programmes.
   • The value of museums' collections as a research resource will be well understood and better links built between the academic community and museums.
2. Museums will embrace their role in fostering, exploring, celebrating and questioning the identities of diverse communities (pp 11–14).
   • The sector needs to work with partners in academia and beyond to create an intellectual framework supporting museums' capacity to tackle issues of identity.
   • The museum sector must continue to develop improved practical techniques for engaging communities of all sorts.
3. Museums' collections will be more dynamic and better used (pp 15–18).
   • Government and the sector will find new ways to encourage museums to collect actively and strategically, especially the record of contemporary society.
   • The sector will develop new collaborative approaches to sharing and developing collections and related expertise.
4. Museums' workforces will be dynamic, highly skilled and representative (pp 17–22).
   • Museums' governing bodies and workforces will be representative of the communities they serve.
   • Find more varied ways for a broader range of skills to come into museums.
   • Improve continuing professional development.
5. Museums will work more closely with each other and partners outside the sector (pp 23–26).
   • A consistent evidence base of the contribution of all kinds of museums to the full range of public service agendas will be developed.
   • There will be deeper and longer lasting partnerships between the national museums and a broader range of regional partners.
   • Museums' international roles will be strengthened to improve museum programmes in this country and Britain's image, reputation and relationships abroad.

The conservation profession response to this report was on the whole less than favourable, the Institute of Conservation (ICON) published their response under the title "A Failure of Vision". It had the following to say:

"No sector can look with confidence to the future if its key asset is worked harder and harder across an ever broadening range of objectives while the inputs required to sustain it are neglected."

"It is of major concern to us that the only part of this section which makes any acknowledgement of the need for greater resourcing is the part which refers to acquisitions. The original consultation paper made quite extensive reference to the importance of collections, the role of new technologies, and cultural property issues, but this appears to have been whittled away in the present document."

Concluding:

"When asked by the Commons Culture Media and Sport elect Committee CMS committee what he would like to see as a priority in the DCMS document arising from the 'Understanding the Future' consultation, Mr MacGregor responded 'I would like to see added there the need to conserve and research the collections, so that the collections can really play the role across the whole of the United Kingdom that they should.' So would we."

Further to this the ICON website summary report lists the following specific recommendations:

• A national survey to find out what the public want from museums, what motivates them to visit them and what makes for a rewarding visit.
• A review of survey results and prioritisation of the various intrinsic, instrumental and institutional values to provide a clear basis for a 10-year strategy
• HR consultants to be brought in from the commercial sector to review recruitment, career development and working practices in the national and regional museums.
• A commitment to examine the potential for using Museum Accreditation as a more effective driver for improving recruitment, diversity, and career development across the sector.
• DCMS to take full account of the eventual findings of the current Commons Select Committee enquiry into Care of Collections in the final version of this document
• The adoption of those recommendations of the recent House of Lords enquiry into Science and Heritage which have a potential impact on the future of museums.

In November 2008, the UK based think tank Demos published an influential pamphlet entitled 'It's a material world: caring for the public realm', in which they argue for integrating the public directly into efforts to conserve material culture, particularly that which is in the public, their argument, as stated on page 16, demonstrates their belief that society can benefit from conservation as a paradigm as well as a profession:

"conservators provide a paradigm not just for fixing things when they are broken, but for a wider social ethos of care, where we individually and collectively take responsibility and action"

Training

Main article: Art conservation training

Training in conservation of cultural heritage for many years took the form of an apprenticeship, whereby an apprentice slowly developed the necessary skills to undertake their job. For some specializations within conservation this is still the case. However, it is more common in the field of conservation today that the training required to become a practicing conservator comes from a recognized university course in conservation of cultural heritage.

The University can rarely provide all the necessary training in first hand experience that an apprenticeship can, and therefore in addition to graduate level training the profession also tends towards encouraging conservation students to spend time as an intern.

Conservation of cultural heritage is an interdisciplinary field as conservators have backgrounds in the fine arts, sciences (including chemistry, biology, and materials science), and closely related disciplines, such as art history, archaeology, studio art, and anthropology. They also have design, fabrication, artistic, and other special skills necessary for the practical application of that knowledge.

Within the various schools that teach conservation of cultural heritage, the approach differs according to the educational and vocational system within the country, and the focus of the school itself. This is acknowledged by the American Institute for Conservation who advise "Specific admission requirements differ and potential candidates are encouraged to contact the programs directly for details on prerequisites, application procedures, and program curriculum".

Associations and professional organizations

Main article: Conservation associations and professional organizations

Societies devoted to the care of cultural heritage have been in existence around the world for many years. One early example is the founding in 1877 of the Society for the Protection of Ancient Buildings in Britain to protect the built heritage, this society continues to be active today.

The built heritage was also at the forefront of the growth of member based organizations in the United States for example, founded in 1889, the Richmond, Virginia-based Preservation Virginia (formerly known as the Association for the Preservation of Virginia Antiquities) was the United States' first statewide historic preservation group. In 2003, it changed its name to reflect its wider focus in statewide preservation issues.

Today, professional conservators join and take part in the activities of numerous conservation associations and professional organizations with the wider field, and within their area of specialization.

These organizations exist to "support the conservation professionals who preserve our cultural heritage".

This involves upholding professional standards, promoting research and publications, providing educational opportunities, and fostering the exchange of knowledge among cultural conservators, allied professionals, and the public.

International cultural heritage documents

Year	Document	Sponsor	Text (English where available)
1931	Athens Charter	International Congress of Architects and Technicians of Historic Monuments	text
1931	Carta Di Atene	Conferenza Internazionale di Atene	text (Italian)
1932	Carta Italiana del restauro	Consiglio Superiore Per Le Antichità e Belle Arti	text (Italian)
1933	Charter of Athens	IV CIAM	text
1956	New Delhi Recommendation	IX UNESCO	text, text
1962	Paris Recommendation	XII UNESCO	text
1964	Venice Charter	II International Congress of Architects and Technicians of Historic Monuments	text, text
1964	Paris Recommendation	XIII UNESCO	text
1967	Norms of Quito	OAS	text (Spanish), text
1968	Paris Recommendation	XV UNESCO	text
1972	Paris Convention	XVII UNESCO	text
1972	Paris Recommendation	XVII UNESCO	text
1972	Carta Italiana del Restauro		text (Italian)
1972	Stockholm Declaration	UNEP	text
1974	Santo Domingo Resolution, Dominican Republic	Interamerican Seminar on the Conservation and Restoration of the Architectural Heritage of the Colonial and Republican Periods – OAS	text (Portuguese), text (Portuguese)
1975	Declaration of Amsterdam	Congress on the European Architectural Heritage	text
1975	European Charter of the Architectural Heritage	Council of Europe	text
1976	Charter on Cultural Tourism, Brussels	International Seminar on Contemporary Tourism and Humanism	text
1976	Nairobi Recommendation	XIX UNESCO	text
1977	Machu Picchu Charter		text (Portuguese), text (Portuguese), text (Spanish), ref (Spanish)
1981	Burra Charter	ICOMOS	text
1982	Florence Charter	ICOMOS: Historic Gardens	text, text
1982	Nairobi Declaration	UNEP	text
1982	Tlaxcala Declaration	ICOMOS	text
1982	México Declaration	World Conference on Cultural Policies – MONDIACULT	text, text
1983	Declaration of Rome	ICOMOS	text
1987	Carta della conservazione e del restauro degli oggetti d'arte e di cultura		text (Italian)
1987	Washington Charter	ICOMOS	text, text
1989	Paris Recommendation	XXV UNESCO	text
1990	Lausanne Charter	ICOMOS / ICAHM	text, text
1994	Nara Document	UNESCO / ICCROM / ICOMOS	text, text
1995	European Recommendation	Council of Europe, Committee of Ministers	text (Rec(95)3E), text (Rec(95)9E)
1996	Declaration of San Antonio	ICOMOS	text
1997	Declaration of Sofia	XI ICOMOS or XXIX UNESCO	text
1997	Carta de Mar del Plata	Mercosur	text (Portuguese), text (Portuguese), text (Spanish), text (Spanish)
2000	Cracow Charter		text (Italian)
2002	Declaration of Cartagena de Indias, Colômbia	Conselho Andino, OAS	text
2003	Paris Recommendation	XXXII UNESCO	text

Example of an archaeological discovery and restoration of a mural painting

• 

  First archaeological search in the 19th-century layer by French archaeologist and restorer Yves Morvan
• 

  Painting of the 15th century cleared before restoration
• 

  Painting after restoration

See also

• Conservation and restoration of books, manuscripts, documents and ephemera
• Cultural heritage management
• Values

Further reading

• Charola, A. Elena, and Robert J. Koestler, eds. Pesticide Mitigation in Museum Collections: Science in Conservation: Proceedings from the MCI Workshop Series. Smithsonian Contributions to Museum Conservation, no. 1. Washington, D.C.: Smithsonian Institution Scholarly Press, 2010. Copies of this volume are available for free pdf download from the Smithsonian's digital library by clicking on the included link.
• Pergoli Campanelli, Alessandro, La nascita del restauro. Dall'antichità all'alto medioevo, Milan, Jaca book 2015 ISBN 9788816412996[1].
• Sandis, Constantine, ed. 'Cultural heritage Ethics: Between Theory and Practice. Cambridge: Open Book Publishers, 2014. ISBN 978-1-78374-067-3
• Staniforth, Sarah, ed. Historical Perspectives on Preventive Conservation. Los Angeles: Getty Publications, 2013. ISBN 978-1-60606-142-8
• H. M. Szczepanowska, D. Jha, T. G. Mathia, eds. Morphology and characterization of Dematiaceous fungi on a cellulose paper substrate using synchrotron X-ray microtomography, scanning electron microscopy and confocal laser scanning microscopy in the context of cultural heritage , Journal of Analytical Atomic Spectrometry, 2015

External links

• Conservation at the Williamson Gallery in the Claremont Colleges Digital Library
• AATA Online, Abstracts of International Conservation Literature
• BCIN, the Bibliographic Database of the Conservation Information Network
• CAMEO: Conservation and Art Materials Encyclopedia OnLine
• Conservation OnLine (CoOL) Resources for Conservation Professionals, "CoOL, an online resource operated by the Foundation of the American Institute for Conservation is a full text library of conservation information, covering a wide spectrum of topics of interest to those involved with the conservation of library, archives and museum materials. It is a growing online resource for conservators, collection care specialists, and other conservation professionals."
• Centre for Cultural Materials Conservation, a Department of Melbourne University.
• DOCAM — Documentation and Conservation of the Media Arts Heritage "to address the issues of preserving and documenting digital, technological and electronic works of art."
• ICOMOS Open Archive: both an institutional archive of the scientific documentation produced by the International Council on Monuments and Sites (ICOMOS) and also a subject archive open to the entire international scientific community in the field of heritage conservation.
• Integrated Pest Management Working Group Website
• International Council of Museums (ICOM) Code of Ethics for Museums, 2006
• Indigo Arts Alliance/ Network, News, Listings and Grants for Conservators
• museumkids/What is Art Conservation? – The Metropolitan Museum of Art, 2001.
• Research Resources at the Getty Conservation Institute, including the AATA (formerly "Art and Archaeology Technical Abstracts") search engine, bibliographies for various topics, cultural heritage policy documents, and links to other conservation-related Web sites.
• Caring for Heritage Collections Online Course. An online course in preventive conservation issues for museum professionals, University of Melbourne, School of Historical Studies: Centre for Cultural Materials Conservation.
• Centre de recherche et de restauration des Musées de France, C2RMF on Wikipedia (French)
• Theory and practice of conservation [2].

Scholarly journals

• Journal of the American Institute for Conservation
• ICOM-CC Ethnographic Newsletter
• Victoria and Albert Museum Conservation Journal
• Journal of Conservation and Museum Studies
• Tate Papers
• Getty Conservation Institute Newsletter
• The Book and Paper Group – American Institute for Conservation
• The Abbey Newsletter
• e-Preservation Science journal
• e-conservation magazine
• CeROArt. on-line magazine devoted to a multidisciplinary approach to questions of Conservation, exposition, Restoration of Objets d’Art
• Studies in Conservation
• Reviews in Conservation
• Journal of the Institute of Conservation
• The Paper Conservator
• Future Anterior. Journal of Historic Preservation, History, Theory, and Criticism, GSAPP, Columbia University

Relation to the public

• UPenn's Architectural Conservation Lab
• You be the Conservator
• Lunder Conservation Center
• Conservation Advice Notes – Portable Antiquities Scheme
• Objects Conservation — Provided by the Division of Anthropology, American Museum of Natural History.
• Conservation Report on Mukul Dey Archives by C. B. Gupta
• Public Art Restoration Services
• Freeview Video 'Science and Fine Art' by David Bomford of the National Gallery. A Royal Institution Lecture showing how scientific techniques aid conservation by the Vega Science Trust.
• New York Academy of Science Podcast about Ad Reinhardt's Black Painting and its restoration
• Preserv'Art – Interactive database of products used in conservation by the CCQ
• Agents of Deterioration – a Game from Liverpool Museum

Conservators in private practice that provide resources

• Animation Art Conservation discusses the preservation of animation art and has many interviews with animation artists that detail their original intent and frequently how they made their art.
• Conrad Schmitt Studios has been conserving artwork for buildings of architectural, historic, and religious significance since 1889.
• EverGreene Architectural Arts, Inc. specializes in conservation and restoration practices globally.
• Oliver Brothers Fine Art Restoration and Conservation, Boston-New York has been restoring and conserving paintings, works on paper, icons, murals, sculpture, gilded objects, and antique and contemporary picture frames for more than one and one-half centuries . Established in 1850, Oliver Brothers Art Restoration and Art Conservation is the oldest art restoration company in the United States.
• Anthony Moore Painting Conservation, York, ME Has been in operation in the Northeast for over 20 years, Anthony Moore Painting Conservation moved to its current location in York, ME in 1991. They have conserved and consulted on numerous paintings for museums, auction houses, historical societies, galleries, insurance companies, as well as a long list of private clients.
• ConservArt, Boca Raton, FL George Schwartz has been active as a conservator in private practice since 1963. Schwartz is a currently a Professional Associate Member -The American Institute for Conservation of Historic & Artistic Works (AIC).
• Spicer Art Conservation. Gwen Spicer is a textile conservator in private practice for 20 years. Spicer is a Fellow of The American Institute for Conservation of Historic and Artistic works. Spicer Art specializes in the treatment of historic flags and banners, and textile artifacts.

External lists

External lists of international cultural heritage documents:

• at ICOMOS – Charters adopted by the General Assembly of ICOMOS and other Standards

• at UNESCO – Official documents
• at UNESCO – Normative Action
• at UNESCO – Legal instruments

• at UN – UN Documents Cooperation Circles – Gathering a Body of Global Agreements

• at The J. Paul Getty Trust – Conservation Institute – Cultural Heritage Policy Documents
• at Fletcher School, Tufts University – Cultural Protection Treaties and Other International Agreements
• at Robert Gordon University – Documents on cultural heritage protection
• at Cultural Heritage.net – Codes-Charters-Declarations
• by JK Gillon – CULTURAL HERITAGE CHARTERS AND STANDARDS

• at Cuba Arqueológica – Cartas Internacionales de Protección del Patrimonio (Spanish)
• at IPHAN – Relação das Cartas Patrimoniais (Portuguese)