The website of the Royal Institute of British Architects (RIBA). The British Architectural Library holds DVDs, videotapes and sound recordings of talks and lectures which can be accessed on site. Holdings are international in scope and cover a wide range of subjects, from prehistory to the present. In addition to architectural theory, practice and history there is material on allied subjects such as building and construction, civil engineering, structural engineering, landscape architecture, interior design and decoration, the decorative arts, town and country planning, and construction law. Holdings can be searched on the library catalogue. The Library is free to non-RIBA members with proof of identity.