Denison-White Mansion, 1915.

Erected in circa 1850, this former mansion is the oldest structure in the Longwood section of the Bronx. Constructed as the private residence of Charles Denison, a Manhattan merchant, the building was originally located just north of the junction of Southern Boulevard and Leggett Lane. Later owned by Denison's son-in-law, Samuel White, the house was likely moved at the end of the 19th century as the streets of Longwood were being laid out.

According to the LPC designation report for the Longwood Historic District, very little of the original building remains. Extensive work on the home at the start of the 20th century removed the large, six-columned portico that fronted the building. The small porch entrance supported by Doric columns was created during these alterations. For most of the 20th century, the building housed a series of firms and community spaces, including a real estate office, quite a few social clubs, and a Police Athletic League center.

By 2006 the property was long abandoned and derelict when a pair of Manhattan-based nonprofit developers of affordable housing planned a large development behind the old mansion. The development included the restoration of the mansion's facade as a community center and the construction of 93 units of affordable housing, with a portion reserved for grandparents (or other older relatives) raising grandchildren. The construction and restoration were completed in 2010.