This Brooklyn home is a rare find. So rare in fact, that the architect built this home, and only this home! It's a historic victorian home in Prospect Park South. It’s not often homes like this hit the market. The 10,000+ square-foot mansion features iconic columns, a dramatic ballroom and plenty of historic details. Friend to the show, Ryan Serhant from Bravo’s "Million Dollar Listing New York," gives us the tour.