The Old Church of Our Lady (Gammel Vor Frue Kirke) is one of the oldest surviving brick buildings in Denmark, dating from the 11th century. It stands in the southern part of the old town, somewhat removed from the main sights, which means it gets fewer visitors than it deserves. The church was originally built as part of a Benedictine convent — the convent was dissolved at the Reformation and the buildings subsequently demolished, leaving only the church.
The building is modest in scale but historically significant. The thick brick walls, small windows, and simple proportions are characteristic of early Romanesque construction in Scandinavia. Medieval frescoes survive in fragments inside. The surrounding area is quiet, with a small cemetery that dates back several centuries.