This Greek Revival house was built in 1843 by William Lewis Morris. Purchased two decades later by Appleton, it was turned into a Victorian villa. It was leased to Teddy Roosevelt and later Mark Twain (1901-1903). A Gothic style weing was added in 1927, Armor Hall. Arturo Toscanini lived in the house (1943-1945), which ultimately was deeded to NYC in 1960.