There will likely be a few tweaks that need to be made, especially to the GUI.

*The map mode looks funky but I wanted to get this out before I messed with that.

Major Changes:
Now only required Medieval Arts
The original Unique Buildings + buildings can be added via game rule.
The original MA-MSB Buildings can be added via game rule
Game rule that allows holding to be automatically set up at game start for buildings added. I.E. there's a castle, it's now a castle holding.
Silk Road has been removed but the special buildings are there.
*This will work without RICE but there may be errors.

Semi Updated for 1.18 - Still uses old UB+ Version.

Temporary Reversion While Working on Update

Updated for Medieval Arts Update
Fixes to UB+ building flags
*If you see an issue with disappearing artifacts, delete the ub_special_buildings_effects file this adds many UB+ buildings. I'm tracking down this issue.

1.17 and Medieval Arts Update

Medieval Arts Update