Offered for the first time in decades, 251 East 71st Street is a one-of-a-kind townhouse that combines historic New York roots with a bold mid-century architectural statement. Originally constructed as a traditional brownstone in the 19th century, the building underwent a visionary redesign in 1969 by architect Maurice Medcalfe of Hills & Medcalfe. Medcalfe transformed the façade into a modernist...