This breathtaking 12th century feudal structure occupies a small island, surrounded by wide moats and an English-style park. It is more famous, however, for its most famous occupant Charles Louis de Secondat. This future member of the Bordeaux parliament was born here. He later moved to Bordeaux, where he was known as Baron de Montesquieu. He wrote "L'esprit des lois" in this chateau, a text that was fundamental in the development of modern democratic systems. The books iare to the Bordeaux city library.