A glass mansion built on the roof of a skyscraper in Miami is on the market for $4.2 million. The 5,801-square-foot Taj Miami sits on top of the 40-story Palace Condominium and includes a 3,000-square-foot roof deck.

The three-story structure was built in 1981 by hotelier and real estate billionaire Leona Helmsley, who was famous for leaving $12 million to her dog in her will.

Almost immediately after the structure was completed, Saudi Shiek Saoud Al-Shaalan purchased the mansion and transformed it into an Arabian-style palace. Twenty-seven Moroccan artisans and craftsmen worked and lived at Taj Miami for two years until its completion. They installed traditional Persian, Turkish and Indian elements including hand-carved wall designs and mosaics.

The current owner, international real estate developer Anthony Tirri, bought the property in 1999, according to press reports, which didn’t include the former sale price. He recently moved to Paris where he lives in the former chateau of Alexandre Dumas.