St. Mary's Church, Osnabrück

St. Marien is a Lutheran parish and market church in Osnabrück, Germany. It is one of the most artistically and historically significant buildings in the North German city. A previous Romanesque church was mentioned in records as early as 1177. However, the history of the church's construction began some time before it was first mentioned in writing. Archaeological traces suggest the existence of a predecessor building in the 10th century. Construction of the Gothic hall church which exists today started in the 13th century and was completed between 1430 and 1440.

The St. Marien church has a complex architectural history. Over time, extensive restorations have enabled archaeological excavations which have contributed considerably to a reconstruction of the building's history. The existence of at least three predecessor buildings has thereby been established.