GOTHS ,VANDALS ,and gepids and quaddi tribes cannot buld hristian temples (only arians !!)
also any nomad fraction cannot build Cristian temples - only barbarian circles
BARBARIANS CAN BUILD ARIAN TEMPLES AND THEIR barb idols too. not need any monastary abbey for arian temples. also if you heave barb idols -you steel can build arian temples -
temples just add peoples loyality for towns.