It is dedicated to St Oswald of Northumbria, an Anglo-Saxon king of the 7th century. He was the patron saint of crusaders in the Middle Ages.
The east wall of the choir tower is characterised by its early Gothic style and romantic arched windows. In 1200, the parish was moved to the more favourably situated "Breite Au". From then on, it served as a branch church in which regular services were held for the entire Hinterzarten-Breitnau parish until 1798. The small cemetery around the old church, which was used until 1863, is still recognisable today. Towards the end of the Second World War, the Oswald Chapel was damaged several times by aerial bombs. It had to undergo extensive restoration in 1950.
To visit the chapel, you have to ask for the key at Hofgut Sternen. This is available against a deposit.