NEW YORK (CBSNewYork) — It’s a done deal.

The family of a Russian billionaire just closed on the most expensive apartment in New York City.

The penthouse, at 15 Central Park West, sold for $88 million.

Dmitry Rybolovlev bought the 6,700 square-foot space for his 22-year-old daughter.

Realtors are calling it the most expensive transaction in Manhattan history.