Oscar Hammerstein II Mathias by his first wife, and James Hammerstein by his second wife, with whom he also had a stepdaughter, Susan Blanchard. Hammerstein was one of the most important "book writers" in Broadway history – he made the story, not the songs or the stars, central to the musical and brought musical theater to full maturity as an art form. According to Stephen Sondheim, "What few people understand is that Oscar's big contribution to the theater was as a theoretician, as a Peter Brook, as an innovator. People don't understand how experimental "Show Boat" and "Oklahoma!" felt at the time they
Arthur Hammerstein his father had a disagreement with money spending and Arthur vowed never to speak to him again. With his father's support, Arthur embarked on his first production, "Naughty Marietta". Arthur's brother Willie Hammerstein died in June 1914, and Arthur took over management of the family's Victoria Theater. However, the theater was not financially viable and would be closed the next year. On its site, the first movie palace in Times Square, the Rialto Theatre, was built. Hammerstein was the producer of the Rudolf Friml operettas "The Firefly" (1912), "Katinka" (1915) and "Rose-Marie" (1924), which he collaborated on with his nephew,