Pfarrkirche Wieselburg, Gothic church in Wieselburg, Austria.

Pfarrkirche Wieselburg is a church with Gothic architectural features, standing at Kirchenplatz 6 with pointed arches, ribbed vaults, and a prominent bell tower. The tower rises distinctly above the town center and shapes the town's appearance.

The church was built between 993 and 994 as an Ottonian central building with a square floor plan within a fortified structure at the river junction. It remains one of the oldest standing church structures from the Babenberg period.

The church is dedicated to Saint Ulrich, whose canonization in 993 and the death of Saint Wolfgang in 994 bracket the consecration of the Ottonian octagon. The parish is first recorded in 1235, and the first named pastor appears in 1291. In the octagon, reconstructions of the fortified church complex and of the octagon's fresco decoration are displayed.

The church stands at Kirchenplatz 6 in Wieselburg. The tower, topped with its 1873 Rautenspitzdach, reaches 47.5 metres. The 1958 extension opens off the south wall of the Gothic nave through four arches. The foundations of the original octagon are marked in colour in the new floor, though pews partly cover them.

A lightning strike and fire in 1952 led to restoration work that uncovered parts of the original construction. This unexpected discovery helped historians better understand the early building techniques of that era.