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
Oscar Hammerstein II off for one minute, and London's West End lights were dimmed in recognition of his contribution to the musical. He was cremated, and his ashes were buried at the Ferncliff Cemetery in Hartsdale, New York. A memorial plaque was unveiled at Southwark Cathedral, England, on May 24, 1961. He was survived by his second wife, Dorothy, his three children and two stepchildren. Hammerstein married his first wife, Myra Finn, in 1917; the couple divorced in 1929. He married his second wife, the Australian-born Dorothy (Blanchard) Jacobson, on May 13, 1929. He had three children: William Hammerstein (1918–2001) and Alice Hammerstein