Willie Hammerstein big draw. Oscar Hammerstein went bankrupt in 1898. The Olympia theater was sold in an auction. Hammerstein managed to raise enough money to build the Victoria Theatre, which opened as a legitimate theater on 3 March 1899. On 26 June 1899 he opened a partially enclosed roof garden theater, the Venetian Terrace Garden, with an outdoor promenade that was attached to the roof garden of Hammerstein's Theatre Republic in 1900. Hammerstein enlarged the roof garden theater and reopened it in May 1901 as the Paradise Roof Garden. In February 1904 Willie Hammerstein took over management of his father's Victoria Theatre.
Baumwollspinnerei Hammerstein changed in a 1930 referendum to Wuppertal (“Wupper Valley”). The Hammerstein manor house controlled much of the valley floor of the Wupper. In 1825 it gave its name to the in , that still stands on the "Hammersteiner Allee", and to a station of the suspension railway. Sonnborn itself gave its name to the on the autobahn 46 and autobahn 535. Downhill from the Villa Hammerstein, the businessman Johann Christian Jung built the weaving sheds and the cotton mill "Baumwollspinnerei Hammerstein" alongside the Wupper between 1835 and 1837. He included workers accommodation in the form of an apartment block. The