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