This poster was hanging in the entry hall.Captain Haddock, Tintin and Milou (Snowy) are walking towards Moulinsart (Marlinspike Hall). 'What's this?!' exclaims Captain Haddock. 'Billions of blistering blue barnacles! What bashi-bazouk has added two wings to my chateau?' 'Ah yes, Captain', says Tintin, 'So you didn't know that the chateau of Cheverny served as Hergé's model for your ancestral chateau?' Off to the side a smugly superior Snowy mutters 'What an ignoramus the captain is. Even I knew that!' and over on the right the detectives Dupont et Dupond (Thomson and Thompson) are saying 'They said Cheverny', 'Not only that: they said Moulinsart.'
It's all very silly, but the cartoons are a fun way to improve your French comprehension, and Cheverny is a great day out whether you are a Tintin fan or not.