THE PONS CESTIUS,

now called Ponte S. Bartolomeo. It was erected, B.C. 45, by the Prætor Lucius Cestius; the inscription records its restoration, A.D. 367, by the Emperors Valentinian, Valens, and Gratian. It consists of a single arch. Over the bridge is Trastevere, the inhabitants of which claim to be descended from the ancient Romans: their manners and customs are somewhat distinct from those of the inhabitants of the other side of the river.

From the bridge (retracing our steps) a street leads into the Piazza Montanara; turn to the right up the Via Montanara; on the right is the Church of S. Nicolo in Carcere, built over three temples.

Entrance to see the substructions through the sacristy.