The Olympia Theatre, also known as Hammerstein's Olympia and later the Lyric Theatre and the New York Theatre, was a theater complex built by impresario Oscar Hammerstein I at Longacre Square in Manhattan, New York City, opening in 1895.

Oscar Hammerstein I was a German-born businessman, theater impresario, and composer in New York City. His passion for opera led him to open several opera houses, and he rekindled opera's popularity in America. He was the grandfather of American playwright/lyricist Oscar Hammerstein II and the father of theater manager William Hammerstein and American producer Arthur Hammerstein.