Thanks.
So it is a bad idea to create new kingdom titles I guess. It may be good for your current king and to get more prestige but in the end it will be more difficult for your heir to be accepted, as soon as he becomes the new king.
Oh and how to avoid other heirs to claim the king title as well? There is always a war between the heirs, who do not accept each other as the new leader.
How? By assigning a teacher, who is very good at diplomacy?
1. No you have to be Emperor of HRE or Byzantine Emperor.
So it is a bad idea to create new kingdom titles I guess. It may be good for your current king and to get more prestige but in the end it will be more difficult for your heir to be accepted, as soon as he becomes the new king.
Oh and how to avoid other heirs to claim the king title as well? There is always a war between the heirs, who do not accept each other as the new leader.
Step 3 make sure your heir has high diplomacy
How? By assigning a teacher, who is very good at diplomacy?