Castel Sant'Angelo

Castel S. Angelo, whose imposing mass still dominates the panorama of Rome, and which is known as the Mole Adriana, was not originally built for defensive purposes but as the funeral monument of the emperors. A new bridge (called Pons Aelius from the nomen of the emperor) which still exists as Ponte S. Angelo was built to put the monument in communication with the Campus Martius.

Ponte Sant'Angelo crossing over the Tiber
Shelly, Beth & Alan