 Incorporated as a village on April 9, 1804, Arbor Hill was annexed by the city in 1815, at which time Patroon Street became Clinton Avenue.The name "Arbor Hill" comes from the nickname of the Ten Broeck Mansion, an important cultural and historical destination in the neighborhood.Arbor Hill includes Dudley Heights, a residential neighborhood north of Livingston Avenue that was the first location of the Dudley Observatory.