I've been fascinated by stories of the Knights Templar, how they began taking deposits from pilgrims. For instance, a pilgrim from England wanted to journey to the Holy Land, but the roads were perilous, and all sorts of interesting things could happen on the way to the Holy Land. Bandits, battles, or a thief in a tavern could empty one's pockets. So the Knights Templar came up with a clever yet simple way for pilgrims to deposit their money and travel across many seas and lands.