8. Villa Leopolda – The French Riviera – 80,000 square feet
In eight place there is Villa Leopolda. Its works started between 1929 and 1931 and were directed by the American architect Ogden Codman Jr. Then, the house remained the property of the Brazilian billionaire Lily Safra until 2008 when she was sold to a Russian oligarch. Situated in the French Riviera, the huge villa has a value of $500 million and it is considered as the most expensive Europe home. Moreover, the big house is characterized by 11 bedrooms and 14 bathrooms, an immense gardens and also a private beach.