Ortygia - Architect Sergio Tinè uses his experience of conserving historic buildings in the island of Ortygia to propose a code of professional practice for urban conservation. Ecole d'Avignon - Offers courses and consulting in historic preservation, decorative painting, and traditional building techniques. Avignon, France. Donhead Publishing - Specializes in practical books on building conservation, preservation and heritage. Also publishes the Journal of Architectural Conservation: abstracts online. Old House Journal - Online magazine. Preservation advice for owners of old homes, restoration directory, products, classifieds, bulletin boards. Restoration Trades Exchange - An online business exchange for the building restoration field in America, featuring directories, job listings, trade forums, regional information. Building Conservation - Cathedral Communications provides a directory of building conservation companies, courses and organizations, mainly in the United Kingdom. Also on-line articles and events listing. The Conservation Glossary - Architectural, building and conservation terms explained by Neil Grieve of The Centre for Conservation and Urban Studies, University of Dundee. Cultural Heritage Search Engine - A directory of sites related to the conservation of cultural heritage - the natural and urban landscape. English and Italian.   Cultural Heritage Charters and Standards - A review of the principal UNESCO and ICOMOS charters and standards for the preservation of cultural heritage by J.K. Gillon. Preservation Alumni - Independent organization of friends and alumni of the Columbia University Historic Preservation Program. Preservation Directory - Resources and research tools for historic preservation and cultural resource management in the US. Lists preservation organizations, programs, historic property for sale, news and events. National Center for Preservation Technology and Training - The U.S. National Park Service provides searchable databases on training, materials, job opportunities, conferences, funding and its grants and projects. Masonry Conservation Research Group - In the Robert Gordon University in Aberdeen describes its research into building stone decay, conservation and historic preservation. Preserve Net - Cornell University's resource for US preservationists includes listings of job opportunities and conferences, along with a directory of web-sites related to historic preservation. Pond Lily Mill Restorations - Ted Hazen supplies extensive, illustrated information on the history and technology of flour milling in America, and the restoration of watermills, with bibliography. USGS National Geologic Lexicon Database - Find out about US stone names here. European Heritage Network - The Council of Europe offers a databank on official heritage policies, and a heritage portal.