I was trying to make sure I understand how Reliquaries (+200%), Enlightenment (-50%), and the different religion (-50%) tourism penalty interact for tourism. Let's say I have one relic. That should provide 8 tourism. This should go to 24 if I have Reliquaries belief. Or, it should be cut to 4 if an AI follows a different religion. What about if I have Reliquaries AND the AI follows a different religion? I thought they would stack additively at first based on how other modified like production bonuses seem to work - so 200% minus 50% would equal +150% bonus, yielding 20 tourism from one relic. Looking at how much tourism is being generated in my current game though it seems they multiple, so 200% * 50% equals 100% bonus, or 16 tourism from one relic. I assume this means if the AI also got Humanism it would be 50%*50%*200% and a relic would only yield 8 tourism with Reliquaries? Sorry if this has already been solved a long time ago. It is a bit tricky to work out the numbers since the Reliquaries Relics are always listed as 24 on the Tourism lens and Great Works screen even when penalties come into play, and the individual AI values do not provide a breakdown by source so you need to work out other things like Holy City, books or wonders plus the the bonus/penalties from Open Borders, trade, etc.