The gate was built to replace the medieval Porta de Mezzo, which had become insufficient for the expanding city's needs.
The architectural design is attributed to Guglielmo Bergamasco, a noted Venetian sculptor and architect of the era.
It is the only city gate in Treviso to retain its original 16th-century exterior aesthetic largely intact.
The Lion of Saint Mark on the facade was restored following damage sustained during various historical conflicts.
The gate's name honors Saint Thomas, referencing an older nearby church that no longer exists.
Porta San Tomaso is the most elaborate of the three surviving gates of the 16th-century Venetian walls surrounding Treviso. Commissioned by the Podestà Paolo Nani in 1518, the gate served as the primary monumental entrance for travelers arriving from the direction of Venice. The facade is constructed from Istrian stone and features a decorative marble frieze and reliefs. It is topped by the Lion of Saint Mark, a symbol of the Venetian Republic's historical influence over the city. The gate is integrated into the remaining bastions and defensive walls that define the northern perimeter of the city center. It sits at the terminus of Borgo Mazzini, functioning today as a traffic-controlled thoroughfare connecting the historic district to outer neighborhoods.
From the pedestrian sidewalk on the outer side of the gate, looking back toward the city to capture the Lion of Saint Mark.
Visit during the early morning to capture the architecture without the congestion of commuter traffic.
Walk along the adjacent sections of the city walls to view the gate from the perspective of historical defensive positions.
Look for the smaller, secondary pedestrian archways flanking the main vehicle entrance for a closer view of the stonework.
Do not attempt to photograph from the middle of the road, as the gate remains a busy entrance point for vehicle traffic.
