Bill Thayer's gazetteer of buildings and monuments: photographs and history. Also online editions of Platner's 'Topographical Dictionary of Ancient Rome' and Rodolfo Lanciani 'Pagan and Christian Rome'.

Buildings of Rome in the Great Buildings Online database: images, descriptions and sources.

Vasi published 10 books of etchings of the monuments of Rome (1746-61), which can be seen here alongside photographs of the same locations today.

Official website of the archaeological site of the Imperial Forums. Includes maps, a virtual tour, and information on life in ancient Rome.

Kalervo Koskimies presents his own clear photographs, together with 18th and 19th century images, of the Classical and later monuments of the city.

A book exploring the basilican church of Sant Agnese fuori le Mura, Rome, rebuilt 625-38 to replace a 4th-century church. Author's biography, reviews, images with extracts.

A gallery of beautiful images of the central cathedral of the Catholic faith provided by Eternal Word Television Network.

Digital photos and descriptions of major monuments by René Seindal.

James Grout's collection of articles, plans and pictures of ancient Rome and its remains, with an extensive bibliography. Includes Vitruvius's comments on temple architecture.

Virtual visit to the underground legacy of the city: photographs and descriptions of archaeological remains, catacombs and other sites. Also maps, glossary and news of discoveries.

Chris Nyborg's guide to churches of all denominations in this city central to the development of church architecture. Includes biographies of their architects and artists.

Paula J. Howarth tells the story of this villa built on the Quirinal hill at the beginning of the 17th century by Cardinal Pietro Aldobrandini, with bibliography.