I seem to have an issue where the mausoleum of theodoric isn't showing up in my build options even though it should. I have the wonder overview mod and it shows there as available in certain cities but it's not an option to build when I open the build queue. I even converted a town to a city that was supposedly available but no luck. I don't think I've ever built this wonder but am trying the build all antiquity wonders challenge and hit this. Just mentioning that in case this is an old 'bug' in the description and it actually needs a specific terrain type as opposed to just any tile next to a coast.