The Villa La Leopolda in Nice, France: $ 398,350,000

Formerly the home of Bill Gates, but now belonging to really rather rich Roman Abramovich, the Villa La Leopolda in Nice, France would set you back roughly £250,000,000 ($ 398,350,000 ). Its 10 acres of lush, garden-filled grounds require an astounding 50 gardeners to look after!! Now this is a villa!