Whether you want to pray or gain a deeper understanding of the history and background of the building, Martin-Luther-Kirche is a worthwhile site to visit. Find out if this holy place is publicly accessible to experience the peace and quiet inside.
You'll have no end of sightseeing choices in Trossingen. Martin-Luther-Kirche is a great place to begin here, but there are plenty of other worthwhile sights to check out. International Aviation Museum, and Museum of Clockmaking are near the house of prayer and will fill in your day nicely.