* "Chez" means "at the home of" or "at the place of." It's already possessive in itself.
* "Du" means "of the" and is used with masculine singular nouns.
* "Cézanne" is a masculine singular noun.
Therefore, you would simply say "Chez Cézanne" to mean "at Cézanne's home" or "at the home of Cézanne."
Example:
* "J'ai visité chez Cézanne." (I visited Cézanne's home.)
Let me know if you have any more French questions!