I am looking to create a character that is a member of a monastic order of Templar Knights. The game setting is a historical one set around the 1200s. Thus, I am looking at source material for "Paladin," "Templar", or/and "Warrior Monk".
More than a historical account (although I am happy to be pointed at one), I am looking at the day to day live, arms and armours, and general information useful to portray a knight of the cross. Clearly, this question would be more at home on history.stackexchange.com but that site is not in beta yet.
If you had some "mystical" accounts, that would constitute a good answer as well. Things like "Holy Grail, Holy Blood" are after all, works of fiction but could serve well as background noise/conspiracies/hidden supernatural truths.
The main question is How to play a historically accurate Templar Knight? What personal experience do you have in playing a Templar? What helped? What hindered?
I care very little about systems and thus I am not looking for rules. However, if a rulebook contains useful background information, that would be a suitable answer.