Hanover Square is a square in the Financial District of Lower Manhattan, New York City. Founded in 1714, the square was named for the newly crowned King George I's House of Hanover. Hanover Square was the center of New York's commodity market until the Great Fire of New York in December 1835. In 2008, the Queen Elizabeth II Garden opened in Hanover Square, remembering the Commonwealth citizens who died in 9/11.