I am playing 1066 start. Now it's 1104. I noticed that one guy holds Kingdoms of Bohemia, Poland and Hungary, and all of those have the same heir - because they all have House Seniority. That guy is Czech.
House Seniority is supposed to be gated by Heraldry innovation. Czechs obviously don't have Heraldry, since it is in "High Medieval", and right now they are in "Early Medieval" era still.
House Seniority is supposed to be gated by Heraldry innovation. Czechs obviously don't have Heraldry, since it is in "High Medieval", and right now they are in "Early Medieval" era still.