Frank Freeman was a Canadian-American architect based in Brooklyn, New York. A leading exponent of the Richardsonian Romanesque architectural style who later adopted Neoclassicism, Freeman has been called "Brooklyn's greatest architect". Many details of his life and work are however still unknown, and Freeman himself has received little recognition outside academia. Many of his works have been demolished or otherwise destroyed, but most of those that remain have received New York City landmark status, either independently or as part of larger historic districts.

The Herman Behr Mansion is a building located at 82 Pierrepont Street at the corner of Henry Street in Brooklyn Heights, Brooklyn, New York City. Constructed in 1888–89 to a design of Brooklyn architect Frank Freeman, it has been described as "the city's finest Romanesque Revival house".