The Coignet Stone Company Building (also the Pippen Building) is a historical structure in the Gowanus neighborhood of Brooklyn in New York City, at the intersection of Third Street and Third Avenue. Designed by architects William Field and Son and constructed between 1872 and 1873, it is the city's oldest remaining concrete building. The Coignet Building is the last remaining structure of a five-acre concrete factory complex built for the Coignet Agglomerate Company along the Gowanus Canal.