In 1547, during the Schmalkaldic War, the towers' stone pyramids were removed to make platforms for cannon. Despite the war, an altarpiece by Lucas Cranach the Elder was unveiled in the church. In 1556 the platforms were replaced by the surviving octagonal caps, a clock and a clock-keeper's dwelling. This was followed by an extension of the east end and the overlying 'Ordinandenstube'. In 1811 the interior of the church was redesigned to a Neo-Gothic scheme by Carlo Ignazio Pozzi.