Arbor Hill Historic District–Ten Broeck Triangle
In 1975 several residents of the Ten Broeck Triangle formed the Arbor Hill Concerned Citizens Association (AHCCA) to lobby the city for improvements in neighborhood services. Many of them lived in the surviving townhouses, which they had often restored themselves. They saw gentrification as the key to revitalizing the neighborhood, due to its proximity to downtown Albany and the growing service-sector jobs there. To further this goal, they worked with preservationists to have the triangle recognized as a historic district. That area was duly listed on the Register in 1978 under that name.
Arbor Hill Historic District–Ten Broeck Triangle
The future district was first established by its oldest contributing property, the Ten Broeck Mansion, built at the end of the 18th century by a prominent local family. It lent its name to the Ten Broeck Triangle, established in the middle of the following century when successful businessmen, primarily lumber dealers, built large houses along Ten Broeck Avenue with the fortunes they had made from trade on the Erie Canal. It was one of the first neighborhoods to develop north of the city's downtown as it grew during the 19th century.