The first tenement codes were written in the mid-1800s, and this was one of the original buildings for worker housing,” adds DeSimio, who spent many hours researching the building’s records in the municipal archives. “It’s a neat place,” she says. “In the mid-to late 1930s the city took tax photos of every single building in the city—it’s basically Google Maps from 1935.”  Photo 7 of 14 in A Brooklyn Couple Rehabilitate a 19th-Century Duplex