Cupola

A picture gallery of cupolas, architecture, art, and picturesque landscapes from around the world. Also US state capitol building histories, wordplay, FAQ and Autocad links.
http://www.cupola.com/

World Art Treasures

Images of a range of ancient and historic art and architecture from the collection of slides in the Jacques-Edouard Berger Foundation, Lausanne, Switzerland.
http://www.bergerfoundation.ch/

Digital Images of Historic Architecture

Galleries of photographs of European and North American architecture from Classical to Post-Modern, whole facades and details, with explanations, by Mary Ann Sullivan, Bluffton College, US.
http://www.bluffton.edu/~sullivanm/

Great Buildings Online

Documents hundreds of buildings and leading architects across the world with 3D models, photographs and drawings, commentaries, biographies and bibliographies. Searchable.
http://www.greatbuildings.com

SPIRO: Architecture Slide Library

Online images from the large collection of slides at the University of California at Berkeley. Can be searched by period, place, building name, personal name, subject type.
http://www.mip.berkeley.edu/query_forms/browse_spiro_form.html

Digital Archive of Architecture

Images of buildings in Europe and America from prehistoric to 20th century by Prof. Jeffrey Howe of Boston College, USA.
http://www.bc.edu/bc_org/avp/cas/fnart/arch/

ArtServe

A huge collection of images of architecture across the world, with an emphasis on the Mediterranean region, Australia and Japan, collated by Michael Greenhalgh of the Australian National University.
http://rubens.anu.edu.au/

Architecture Through the Ages

An introduction to world architecture produced by American teenagers through Think Quest. Images, discussion and bibliography for Egyptian, Chinese, Aztec, Mayan, Greek Roman and Gothic buildings.
http://library.thinkquest.org/10098/

Thais 4000 Years of Architecture

A photographic guide to Egyptian, Greek, Islamic and Romanesque architecture, indexed by localities, subjects and periods.
http://www.thais.it/architettura/default_uk.htm

Art Historians' Guide to the Movies

A record by Craig Eliason of appearances of and references to famous works of art and architecture in the movies, arranged by period.
http://personal1.stthomas.edu/cdeliason/ahgttm.htm

World Heritage

Elegant site from UNESCO explaining the choice of certain buildings and sites as World Heritage. List with pictures and information available on each. French and English language options.
http://whc.unesco.org/

Glass Steel and Stone

Offers photographs and descriptions of outstanding buildings across the world, historic and modern.
http://www.glasssteelandstone.com

UCLA Cultural VR Lab

The University of California develops Virtual Reality models of ancient and historic buildings around the world. Mission, staff profiles, computer-generated reconstructions.
http://www.cvrlab.org/

Cities and Buildings Image Database

A searchable photographic database of buildings from around the world and across the ages, designed by the University of Washington's Architecture, History and Art History Departments.
http://content.lib.washington.edu/buildingsweb/index.html

CyArk

A prototype project to test the concept of a digital archive of 3D survey information of endangered world heritage sites.
http://www.cyark.org