Untertorbrücke, Stone arch bridge in Bern, Switzerland.

The Untertorbrücke is a stone arch bridge spanning the Aare River in Bern, linking the eastern bank with the Old City through solid arches. The structure extends roughly 52 meters and carries both vehicle traffic on two lanes and pedestrians on dedicated sidewalks.

The structure was built between 1461 and 1489, replacing an older wooden bridge that stood on this site since 1256. For a long time it served as the only crossing of the Aare in Bern until the 19th century brought additional bridges.

The bridge gives its name to the Mattequartier at its western foot, the tanners' and millers' quarter that grew up around the crossing. The Ländtetor beside it, once the only direct entrance to the lower town, was walled up in 1873, uncovered during renovations in 1959 and restored two years later.

The cobbled roadbed carries two motor-traffic lanes plus sidewalks, and the Neo-Gothic wrought-iron railing installed in 1819 lines the edges. At the eastern bridgehead the road bends south where it once passed beneath the former guard tower, the Felsenburg. The bridge links the Mattequartier in the Old City with the Schosshalde neighbourhood.

During construction from 1461 to 1489, the bridge contained a chapel that was consecrated in 1467 before the entire structure was completed. This religious function linked passage and faith within a single edifice.