Trepponti bridge, Stone bridge and city gate in Comacchio, Italy

Trepponti bridge is built of red brick with white stone trim: two square towers with shallow tiled roofs flank a wide arch over the Pallotta canal, and stairways descend from each tower toward the water. Five staircases in brick rise to a raised platform of Istrian stone, a small pentagonal square above a cross-vaulted ceiling, where the canal splits into four inner waterways.

A cardinal commissioned the bridge construction in 1638 as part of Comacchio's urban renewal under Papal States rule. The project followed plans to reshape the city and improve its canal networks.

A decorated plaque on the bridge displays verses from Italian poet Torquato Tasso that describe the canals and local landscape. Visitors can read these words and understand how literature connects to the place where they stand.

The five staircases lead to different streets and markets in the city below, so visitors can choose their route based on where they want to explore. The structure is accessible on foot and offers views over the canals from above before descending into the city.

The five arches are not all part of the same crossing: the Sant'Agostino and San Pietro canals, once part of Comacchio's old moat, also meet the Pallotta here, so the structure is technically five stone arch bridges joined by a pentagonal platform. The name Trepponti means "three bridges", although five spans stand over the water.