319 Broadway, also known as the Metropolitan Life Insurance Company Home Office, is a five-story office building on the corner of Broadway and Thomas Street in the Tribeca neighborhood of Manhattan in New York City. It is a cast-iron building in the Italianate architecture style, built in 1869–70 and designed by D. & J. Jardine. It is the lone survivor of a pair of buildings at 317 and 319 which were known as the "Thomas Twins". The cast iron for these mirror-twin buildings was provided by Daniel D. Badger's Architectural Iron Works. The building became a New York City designated landmark on August 29, 1989.