The Brooklyn Union Gas Company Headquarters, also known as 176 Remsen Street, is a historic building in Brooklyn Heights, Brooklyn, New York City. Designed by Brooklyn architect Frank Freeman in the neoclassical style, it was completed in 1914 as the headquarters of the Brooklyn Union Gas Company. The structure was part of the St. Francis College campus from 1963 to 2022.

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.