Ponte Sant'Angelo, once the Aelian Bridge or Pons Aelius, meaning the Bridge of Hadrian, is a Roman bridge in Rome, Italy, completed in 134 AD by Roman Emperor Hadrian, to span the Tiber, from the city center to his newly constructed mausoleum, now the towering Castel Sant'Angelo. The bridge is faced with travertine marble and spans the Tiber with three arches; it was approached by means of ramp from the river. The bridge is now solely pedestrian, and provides a photogenic vista of the Castel Sant'Angelo. It links the rioni of Ponte (which was named after the bridge itself), and Borgo.
In times past, pilgrims used this bridge to reach St Peter's Basilica, hence it was known also with the name of "bridge of Saint Peter" (pons Sancti Petri). In the seventh century, under Pope Gregory I, both the castle and the bridge took on the name Sant'Angelo, explained by a legend that an angel appeared on the roof of the castle to announce the end of the plague. During the 1450 jubilee, balustrades of the bridge yielded, due to the great crowds of the pilgrims, and many drowned in the river. In response, some houses at the head of the bridge as well as a Roman triumphal arch were pulled down in order to widen the route for pilgrims.