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This is the former childhood home, called Castello di Castagneto Po, of Carla Bruni-Sarkozy. She sold the castle in 2009 to Saudi Arabia's billionaire businessman Prince Alwaleed bin Talal, who is listed by Forbes as one of the world's wealthiest men. The Prince is trying to sell the castle just months after he bought it.
http://www.reuters.com/article/lifestyleMolt/idUSTRE59R5V120091028
http://www.propgoluxury.com/EN/PropertyNews/Piedmont/280-Carla-Bruni-castle.html