The most expensive apartment in the world with 400 million dollars

The most expensive apartment in the world at the top of a skyscraper built on the shores of the Principality of Monaco on the edge of the European continent, but the owner of this apartment is not yet known, where they will be put up for sale next year, and is expected to be won by one of the richest man in the Gulf are fond of luxury and elegance and excellence
It is scheduled to be displayed apartment for sale for $ 400 million, according to the quoted newspaper Daily Mail" British developer of the residential tower, which finally saw the light on the banks of Monaco, and has a height of 560 feet