Update: can be made compatible with City Brothel by just including it as a dependency in the modinfo file (so that City Brothel loads first and the building already exists in the database when this mod's query to add the modifier to buildings of that type works correctly):

<Dependencies>
<Mod id="41277a91-cc5f-484d-b205-bfd613600f12" minversion="0" maxversion="999" title="City Brothel" />
</Dependencies>

Just to be clear, the synergy only works with brothels from your core mod, and not City Brothel ?

Does this mod come with brothels or do brothels only come with another mod?

Very good

Very good content

@Veshakar: works as intended for both situations from a balance point of view. In Sapiens ancient wonders are more powerful, so the buff on brothels makes up for that. Still powerful even without it with +2 Happines/Culture/Faith and extra range for Land AND Sea Trade Routes. Could buff the latter a bit more but I think it's comparable to similar wonders in that era.

Unless I'm mistaken, I don't see brothels being added to the game, so to be more accurate this only works as a standalone partially?

The wonder grants +1 Happines to every brothel. I don't know what brothels you have in your cities but in Sapiens they only grant +1 Happiness and +1 Gold, and you can have only one per city, so it's not op, it's nice.

so like this means brothel gives you +4 local happeness per city, seems pretty op