Who will you play first with Royal Court?

[Areysak]

I read it as just a historical aside about the nature of the Byzantine crown, rather than a description of a game mechanic, but I do see your point. Perhaps @AreysAK can fill us in on what they meant.

The HRE crown is specially scripted to not wander around but stay with the title, despite being an inventory artifact (which usually goes with the player heir). On the other hand, the Byzantine crown bit was more of a historical aside, because we don't have ONE Byzantine crown...

 

[Areysak]

Anyway to give this script to other artifacts with mods, eg apostolic crown of hungary, iron crown of lombardy

Easy-peasy! It's all script