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MMORPG.com Ultima Online expert V D has provided us with this guide to Chivalry Skill training in the classic MMO.
Chivalry Skill Training Guide
If you are a Paladin then Chivalry is a required skill for you, and it is also of great use for all melee characters because it allows casting of magic spells to heal and to enhance combat abilities. The only real requirement for those spells will be tithing points. Focus is also a good skill to have depending on the type of combat you have chosen, since it will regenerate both mana and stamina passively.
Tithing points are like mana for mages. The difference is that tithing points are bought with 1 piece of gold per point, and you can only have a maximum of 100,000 points at a time on your chivalry spell book. In order to purchase points you have to go to any shrine. There is one in Luna, the Shrine of Wisdom. While carrying all the gold you can in your bag you single click the ankh and in the menu select ithe Gold Now it will ask how much you wish to donate, and it must be in increments of 100 gold pieces. The price of tithing points never changes, but having high karma will reduce the amount of points required to cast each spell.