Ch¢teaux is the French word to describe a country or manor house. You would not therefore expect to find a ch¢teaux in a city. However, in Canada, a ch¢teau normally denotes a hotel and Ch¢teau Frontenac is the name for a very grand hotel in Quebec.

what was the favourite place of Antoine de saint exupery when he writes

Recount Saint-Exupery's experiencs in the desert before his rescue

There is no evidence that Saint-Exupery was a Freemason. He may well have been but, if he was, it was unimportant enough that his biographers have not mentioned it.

a cak / some cake / cakes = le gâteau / du gâteau / des gateaux