A series of major reconstructions and restorations were carried out in the second of the century from 1837 to 1888. This included rebuilding the crypt and the addition of new stained-glass windows. The choir was given its multicolour painted decoration, by Édouard Steinlé and Charles Auguste Steinheil, finished in 1879. Construction of the Neo-Romanessque dome over the transept was begun, and new bronze doors were installed in 1879. During the Franco-Prussian War of 1870-71, city was under siege. The roof was set afire and the cross at the top of the spire was bent by a German artillery shell. After the French defeat, Alsace was ceded to the new German Empire until 1918. Following the war, Klotz took German nationality so he could continue his work. He reconstructed the dome over the transept in a grander, Romanesque Revival style.