Klosterkirche Heilig-Kreuz, Monastery church in Old Town, Regensburg, Germany

Klosterkirche Heilig-Kreuz is the church of the Dominican convent of Heilig Kreuz in Regensburg's northwestern Old Town. Its single-nave, broad rectangular nave, built 1237–1244, has a flat wooden ceiling and fourteen tall, very narrow windows; a three-sided vaulted choir closes the east end. The interior was refitted in Rococo style around 1757 by Simon Sorg, Johann Baptist Modler and Otto Gebhard.

On 22 February 1233 Bishop Siegfried of Regensburg gave a building plot to a group of pious women, laying the foundation of the monastery; the church itself was built between 1237 and 1244. In 1246 the house was formally handed to the Dominican Order. In 1484 nuns from Nuremberg's St. Katharinen convent were incorporated, and around 1800 Elector Carl Theodor von Dalberg tied the convent's survival to opening a girls' school.

The interior combines Romanesque elements with Rococo details, visible in the main altar featuring a Romanesque crucifix. The mix of styles shows how the space evolved through different periods of religious practice.

The church sits in the northwestern part of Old Town near St. Blasius Church and is easily accessible on foot. The building received comprehensive restoration work between 1980 and 1983, keeping it in good condition.

The site was originally a stone quarry that provided materials for Regensburg's city walls in the 10th century. This connection to the city's early medieval development adds a hidden layer to the location's history.