The Churches of Rome
- 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.
- http://romanchurches.wikia.com/wiki/Main_Page

Villa Aldobrandini
- 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.
- http://www.paulahowarth.com/villa/

Images of Rome
- Kalervo Koskimies presents his own clear photographs, together with 18th and 19th century images, of the Classical and later monuments of the city.
- http://www2.siba.fi/~kkoskim//rooma/pages/

Encyclopaedia Romana
- 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.
- http://penelope.uchicago.edu/~grout/encyclopaedia_romana/

Ancient and Historic Rome
- 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'.
- http://penelope.uchicago.edu/Thayer/E/Gazetteer/Places/Europe/Italy/Lazio/Roma/Rome/

Subterranean Rome
- 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.
- http://www.underome.com/

Capitolium
- Official website of the archaeological site of the Imperial Forums. Includes maps, a virtual tour, and information on life in ancient Rome.
- http://www.capitolium.org/

Rome the Eternal City
- Digital photos and descriptions of major monuments by René Seindal.
- http://sights.seindal.dk/sight/2.html

Passing Through St. Peter's
- A gallery of beautiful images of the central cathedral of the Catholic faith provided by Eternal Word Television Network.
- http://www.ewtn.com/gallery/sp/sp1.htm

Architecture of Rome
- Buildings of Rome in the Great Buildings Online database: images, descriptions and sources.
- http://www.greatbuildings.com/places/rome.html

Margaret Visser: The Geometry of Love
- 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.
- http://www.margaretvisser.com/