"We must've been through hundreds of books already and we can't find him anywhere —"
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"Is this all real? Or has this been happening inside my head?"
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J. K. Rowling had previously stated that Beauxbatons was located near the city of Cannes. Pottermore, however, retcons this, instead placing its location in the Pyrenees. It is, of course, possible that Cannes is the departure point of some sort of French equivalent of the Hogwarts Express.