Sheridan Hollow, Albany, New York
On a map made by De Witt in 1790 the name of Arbor Hill makes its first appearance on a map of Albany. In this map Arbor Hill is located in Sheridan Hollow between Orange Street and Clinton Avenue (south and north) and from Chapel Street halfway to Hawk Street (east to west); later Arbor Hill would be the name given to the Ten Broeck Mansion and surrounding neighborhood on the other side of Clinton Avenue, the former village of Colonie. On this same map a "Negro burial ground" is shown along the southern rim of the Hollow, this burial ground does not show up on any subsequent maps and it may never have been plotted and used.
Arbor Hill Historic District–Ten Broeck Triangle
Continuing historic surveys and inventories of the area found that the blocks between the Ten Broeck Triangle and North Swan also had many intact rowhouses from the same 19th century period with little modern intrusion, even if some of them were in a state of neglect and disrepair. That area also extended to St. Joseph's School, part of the church's complex. Accordingly, in 1984, the district was extended by to its present size. In addition to almost tripling its area, it more than doubled the amount of contributing properties. The expanded district was renamed to reflect the area's wider scope and historic naming.