Ponte Sisto is a bridge in Rome's historic centre, spanning the river Tiber. It connects Via dei Pettinari in the Rione of Regola to Piazza Trilussa in Trastevere. The construction of the current bridge occurred between 1473 and 1479, and was commissioned by Pope Sixtus IV (r. 1471–84), after whom it is named, from the architect Baccio Pontelli, who reused the foundations of a prior Roman bridge, the Pons Aurelius, which had been destroyed during the early Middle Ages. Currently traffic on the bridge is restricted to pedestrians. (According to Mandell Creighton's History of the Papacy, the Sistine Bridge was built of blocks from the Coliseum. Further, that Sixtus was mindful of the disaster which had occurred in the Jubilee of 1450 through the crowding of the Bridge of S. Angelo, which was