I played Ala ad-Din of the Khwarezm Empire once (the dude who executed some mongol ambassadors and provoked the wrath of Genghis Khan, who annihilated his empire). He started losing body points when he was still relatively young, about 40 years old. Usually, characters start losing body points in their late 50s or early 60s, which signals their health is decaying and they might die anytime. He lost nearly all his body points and couldn't give commands anymore, so I had to govern with the advisor while I waited for him to die so I could have his son succeed him.
The motherfucker made it to 84.
He outlived the advisor, all the generals and his son. I had never seen a character live to that age before. I had to govern with the advisor for decades, which is very limited because you can't choose commands, only say yes or no to what the advisor proposes. After he lost nearly all his body points, every turn I'd think "now he'll finally kick the bucket" but the motherfucker hanged on for another 40 years. I thought the game had glitched and he wasn't going to die. As soon as he died it was game over since his only son died way before him and I couldn't make more babies because he had no body points to visit the wife.
It was fun.