Here is the full list of all 19 Fit For a King achievements.
Marry a princess.
Get a suit of gold.
Play an anachronistic song.
Get assassinated.
Meet the leader of a distant land.
Ride a horse.
Get an evaluation of your rulership.
Have a swashbuckling adventure.
Reform the church.
Ordain the bear.
Meet your rival at the summit.
Outspend your rival at the summit.
Make your rival cry.
Fill your chamber with spouses.
Fill your jail with prisoners.
Marry an inanimate object.
Get a suit of gold for a monkey.
Gain 5xp.
Conquer the known world.