The function defined in the lua script file is having an unintended effect of deleting the Aztec Floating Gardens building after it is constructed by the Aztecs when they have no religion. I confirmed this by only using this mod with IGE and manually giving myself a Floating Gardens, and on next turn it gets removed from the city. The Floating Gardens has a building class ID of 0 in the base game, and in your script initializing both “iDummyID” variables to 0 results in the building in the player's city of TYPE ID 0 changing to TYPE "BELIEF_SACRED_PLACES" or "BELIEF_SACRED_PLACES_DUMMY" as defined in your XML when line 46 resolves to FALSE (i.e. no majority religion in the city).

It goes: INITIALIZE to 0, do logic checks, checks result in FALSE, so dummy variables don't get updated to 1 respectively, and lines 58-59 still run regardless of the variables' values, changing the city's building with ID 0 in the city to types defined in your XML file.

Normally, this is harmless for every civ since there will never be a building class of TYPE ID 0 in their cities, except the Aztecs. I think a potential fix would be to not initialize your dummy variables values as 0, and to rather set them to a higher number that is not used by anything in the base game. I fixed this locally by editing the lua script and initializing the dummy variables to both 9998 respectively, but do not know if this will cause the Sacred places belief to stop functioning altogether.

If this mod was not meant to be used as a standalone, my apologies, but mod was working great with all Civs until I tried to play as Aztecs and noticed my gardens kept getting deleted and narrowed it down to this mod. Otherwise, great mod thanks for your contribution!