For the final score at the end, I know it's previous rulers' prestige+piety. However, I'm not sure how the current ruler at the (timed) game-end contributes. My final ruler was in power for 60 years, started as Queen of Ireland & Alba, and became Empress of Brittania, Queen of France, England, Wales and Brittany. Her prestige+piety was at least 30k, and yet, in the final tabulation, her score is a puny 485. What exactly is the mechanism for the score for the leader you end your game with?