The last Koster and Bial's Music Hall originated when they moved uptown into the former Manhattan Opera House, a huge theatre built in Herald Square in 1892 by Oscar Hammerstein I in pursuit of his passion for grand opera.
Prior to the 1909 purchase of the building on behalf of the Metropolitan Opera by Otto Kahn, Oscar Hammerstein I presented an opera season and began to make plans to remodel it by enlarging the stage area.
Following her season in New York City, she went to London to help Oscar Hammerstein inaugurate his London Opera in 1911; that year, she scored great successes in French roles.
Oscar Hammerstein I (1847–1919), cigar manufacturer, opera impresario and theatre builder
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In 1933, the American theatre impresario George Blumental (a former associate of Oscar Hammerstein I, who in 1917 had tried to set up theatres for American troops in Paris), tried to arrange with Georg Hartmann and Arthur Hirsch to bring over conductor Blech and a troupe of 12 Jewish opera singers to present Wagner's Ring in New York.