by gillum
davypi wrote:
One of the special buildings that came out allowed you to convert clay and another resource (I forget which) into money
Brick Manufacturer lets you convert 3 bricks (not clay) and 10 francs once to 24 francs.
Grande Hameau's Clay Company lets you convert any number of sets of 1 wood and 1 clay to 3 francs per set. The linked item says, "The Clay Company really starts to shine towards the end of the game, when there are huge piles of wood and clay that nobody wants."