VILLEFRANCHE-SUR-MER, France – The Cote d’Azur estate where Princess Margaret of Denmark and her husband, Prince Rene of Bourbon-Parma, made their home has recently been listed for sale at a no-reserve auction on Tuesday, May 16. Overlooking the French Riviera, the one-of-a-kind residence is known as La Carriere. It dates back to the 1920s, and is a majestic manor house built into the stone walls of a fortress. The stunning villa melds rustic charm with modern luxury, while the walls provide the ultimate in privacy and security. The list price, prior to auction, was $12 million.