WEBMar 30, 2024 · St. Peter’s Basilica, present basilica of St. Peter in Vatican City (an enclave in Rome), begun by Pope Julius II in 1506 and completed in 1615 under Paul V.It is designed as a three-aisled Latin cross with a dome at the crossing, directly above the high altar, which covers the shrine of St. Peter the Apostle.St. Peter’s Basilica is one of the most renowned works of Renaissance ...