Claremont Hill was the site of the Battle of Harlem Heights, fought during the Revolutionary War, on September 16, 1776. By 1806 it had been acquired by Michael Hogan, a former British Consul in Havana, who built Claremont Mansion (for which Claremont Avenue was named). Possible sources for the name are Hogan’s birthplace of County Clare, Ireland and his friend Prince William, Duke of Clarence, who would ascend the English throne as King William IV in 1830. Known as the site of a popular roadside inn by 1860, Claremont was acquired by the City from the heirs of Joel Post in 1873, for the development of Riverside Park.