Sonnenberg Castle site was first time mentioned in 1242. The original castle was destroyed in 1407 during the Appenzell Wars and rebuilt by Landenberg family. It was again rebuilt in 1596 after a fire. Today Sonnenberg is restored and houses a restaurant.
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.