Ponte romano di Rieti, Roman bridge in Rieti, Italy.

Ponte romano di Rieti is a stone arch bridge crossing the Velino River with three arches built using Roman masonry techniques of precisely cut blocks. The structure spans about 39 meters and displays the construction methods typical of Roman engineers.

The bridge was built in the 3rd century BC during the Roman Republic as part of the Via Salaria, the road by which the Sabines obtained salt from the Adriatic and connected with Rome. An inscription dated 42 AD attributes a restoration or rebuilding to Emperor Claudius. In the Middle Ages it was fortified with a tower-gate on the left bank, and in 1312 a second tower was added toward the Borgo; both were demolished by 1383.

This crossing linked Rome with the Sabine lands and served as a crucial point for exchange between these two regions throughout antiquity. The bridge became woven into the identity of Rieti as a gateway between different worlds.

The original Roman structure remains as archaeological remains in the riverbed beside a modern 1939 concrete bridge that carries today's traffic. Visitors can view traces of the ancient construction from the current crossing while standing above the water.

A tower called the cassero stood on the left bank from the Middle Ages, controlling traffic and tolls; it was rebuilt in 1439 by master Giacomo da Varese and demolished only in 1883. An earlier cassero added towards the Borgo in 1312 was torn down in 1383 because it obstructed the river, together with shops built on the bridge.