Roggeborgen was a residence of Strängnäs bishop since 1626. The building was constructed by bishop Kort Rogge (1479-1501) in the late 1400s. Between 1626 and 1930 it functioned as a Gymnasium. Today it is a library including 70000 old articles from the episcopate of Strängnäs.
References:The first written record of church in Danmark locality date back to the year 1291. Close to the church are several stones with a Christian text and cross inscribed. The oldest parts of the present red-brick church are from the 1300s. In the late 1400s the church was enlarged to the appearance it has today. The church has been modified both internally and externally several times, among other things after the fires in 1699 and 1889. There are lot of well-preserved mural paintings in the walls.