588 Madison Street is a French Neo-Grec brownstone built in 1889 by the architect William Godfrey. While the single-family, Bed-Stuy home is steeped in history, a recent owner has brought it stylishly into modern day. The owner/developer, a principle at the design firm KGBL, specializes in designing high-end furniture. Here, they played off the existing historic details to add some unique, modern touches. And the mashup of historic and modern is asking nearly $3 million.