Grub castle was first time documented in 1237 and was probably built somewhere in the late 12th or early 13th century. In 1620 the castle was destroyed by the Bavarian Duke Maximilian I. The castle never recovered and fell to ruin. It was restored in the 1970s.
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.