One of many, many variations of the Medieval Knights Code Of Chivalry. No one region, kingdom or country had a unified code, although they did share various aspects between them. The "Rule" of the Knights Templar had 76 parts. who says chivalry is dead?
It ranked from highest to the lowest. Kings: Rulers, Lords: Protect and handle territory, Knights: Protect Lords, and the king, Serfs: Work the land and take care of things that need to be taken care of.