A $19.75 million pair of townhouses is currently on the market.

The Missionary Sisters of the Immaculate Heart of Mary, an NYC-based convent of nuns, acquired the townhome on the right in 1948. Four years later, the group bought the one next door and connected them via a doorway on each floor.

Throughout the years, the order has rented some of the complex's 25 bedrooms to other congregations or young women in need. But the Frankenmansion may soon find a new owner — the 15,600-square-foot space went on the market for $19.75 million in 2016, according to the New York Times.