As a preface, Note that Chateaus is correct in English, although Chateaux is also acceptable. With very few exceptions, plurals in English do not have to use foreign language pluralization rules. I also did a search on this forum for 'Chateau' and did not find this topic. Nonetheless, please forgive if this is a duplicate and refer me to the appropriate thread. The Question: The Civopedia only says that a chateau must be placed by a river. However, simply earning the Humanism civic as France is not enough to build a chateau on an unimproved river tile. I suspect there is an unstated rule about the chateau needing to be within a certain distance of an improved luxury resource. Can anybody verify this or substantiate the specific rule with a reference to the documentation? ps. I think such a restriction would be reasonable, as that would be consistent with the Chateau in Civ 5, although I see I can build them next to each other now.