Between 1904 and 1930, Bielefeld grew, opening a rebuilt railway station, a municipal theatre, and finally, the concert hall, renowned for its excellent acoustics. The Dürkopp car was produced 1898–1927. After printing emergency money () in 1923 during the inflation in the Weimar Republic, Bielefeld was one of several towns that printed very attractive and highly collectable banknotes with designs on silk, linen and velvet. These pieces were issued by the Bielefeld Stadtsparkasse (town's savings bank) and were sent all around the world in the early 1920s. These pieces are known as "Stoffgeld" – that is, money made from fabric.