"West side of Clinton Avenue between DeKalb Avenue and Lafayette Avenue, 1974." No. 320 (right) is a Second Empire house built in 1867-8 for John O’Mahony, a liquor dealer. The mansard roof, entranceway, and lintels survived a 1920s-era remodel. No. 324 (left) is a larger and more imposing Second Empire structure, built in 1869 for the willow ware pottery manufacturer Lambert Heyniger.

Clinton Avenue contains some of Brooklyn’s finest 19th century architecture, including the Gilded Age mansions that made it the borough’s most fashionable address. A walk down the length of the avenue tells the story of this transformation: from the provincial farming community shaped by a handful of prominent landowners to a “Gold Coast” boulevard of grand Renaissance Revival buildings, and later to the tension between wartime housing needs, development, and the nascent historic preservation movement.