There are 5 naves in the church. It is the oldest such church in southwest Germany, and the only "hall church" in Alsace. The church is also known for its organs. One of them was built by Johann Andreas Silbermann in 1741. The family Silbermann (father and sons) were the most important German organ-builders of the 18th century. Wolfgang Amadeus Mozart played on this organ several times during the three weeks he spent in Strasbourg in 1778 and wrote in a letter to his father Leopold Mozart about it. The other organ (built for the choir) was designed by Albert Schweitzer and built in 1906. 