The 5-floor Federal-style townhouse has 3 terraces and a private backyard.
The author bought the estate in 1909 for his daughter, Jean.
It has a Food Network-approved kitchen.
After lingering on the market since 2013, the sprawling triplex finally found a buyer at $44M.
The NBC anchor's tailored residence at the Grand Madison was only on the market for a few months.
Called 'Two Barns,' the residence is comprised of two 17th-century English barns that were re-constructed on the property.
The 'Sex and the City' actor is headed back to the Upper East Side.
The 19-year-old actress bought this house less than a year ago.
Take a look back at some of your favorites.
Late venture capitalist Jerome Stern commissioned a 7,500-square-foot "art barn" for the property.
The actor has owned this 5.5-acre estate for nearly a decade.
Tabitha Simmons' posh new home is outfitted with extensive shoe storage.
It's bursting with vintage details.
Not surprisingly, it has an elaborate home theater.
They designed the 3-bedroom model residence with a curated mix of vintage and contemporary pieces.
It's the ultimate entertaining property.