1975 "Great Architecture of the World" ISBN 0-394-49887-9* Touring Club Italiano, "Roma e Dintorni"==External links==*Great Buildings On-line: Piazza of St. Peter's*Video of St. Peter's Square*Roberto Piperno, "Piazza di S. Pietro": engravings by Vasi*Mary Ann Sullivan, "St Peter's Piazza, Vatican City"*St. Peter's Square 360° Panorama*Vatican City, Piazza San Pietro VR panorama (Java) with map and compass effect by Tolomeus*Vatican City, Piazza San Pietro QTVR fullscreen panorama hi-res (11 Mb) by Tolomeus*Obeliscus Vaticanus LacusCurtius.com, The Vatican Obelisk, retrieved September 4, 2006*The legend of the cry of Bresca Legendary Rome*Rome, Nova Online, Mysteries of the Nile, A World of Obelisks: Rome pbs.org, retrieved September 4, 2006*St. Peter's Square 3D via Microsoft Photosynth, retrieved June 12, 2007 (dead link)*St. Peter's Square, Bernini's Fountain
1975 "Great Architecture of the World" ISBN 0-394-49887-9* St. Peter's Basilica New Photos of the Square* Great Buildings On-line: Piazza of St. Peter's* Video of St. Peter's Square* Roberto Piperno، "Piazza di S. Pietro": engravings by Vasi* Mary Ann Sullivan، "St Peter's Piazza, Vatican City"* Saint Peter's Square 360° Panorama* Vatican City, Piazza San Pietro VR panorama (Java) with map and compass effect by Tolomeus* Vatican City, Piazza San Pietro QTVR fullscreen panorama hi-res (11 Mb) by Tolomeus* Obeliscus Vaticanus LacusCurtius.com, The Vatican Obelisk, retrieved September 4, 2006* Rome, Nova Online, Mysteries of the Nile, A World of Obelisks: Rome pbs.org, retrieved September 4, 2006* St. Peter's Square 3D via Microsoft Photosynth، retrieved June 12, 2007* Saint Peter Square، Bernini's Fountain