It's one of the richest nations on earth and a romping ground for movie stars, playboys and millionaires. But the latest property to hit the market in Monaco is expensive even by the standards of its Ferrari-touting residents.

Tour Odéon's newly constructed skyscraper towers majestically on the skyline of this tiny city-state. Rising 170 metres above sea level, it comprises 70 apartments with floor-to-ceiling windows, chic private terraces and unparalleled views of the French Riviera.

Its pièce de résistance is the 3,300-square metre "Sky Penthouse", which luxury property developers Groupe Marzocco hope to sell for a whopping €300 million - or £240 million.

This would make it the world's most expensive penthouse, according to global property consultants Knight Frank LLP, quoted by Bloomberg.

Is this the world's most expensive apartment? Take a look inside the £240M Monaco penthouse