Posts: 8,857
Thanks: 3118 in 87 Posts
32 Achievements
Ii is actually not that easy: royals and nobles mostly went to the king's palace for balls and extravagant parties. Interests were probably hunting, horse racing, bloodthirsty activities (like the "sport" at the Colosseum in Rome), watching plays at the royal theatre, visiting each other, planning wars with the king and trading slaves. The eldest son would inherit the land, the second son would go into the military, the third one into the church.
So whatever you build them, I'd think you should add underground basements so that they have a place to hide when the revolution arrives