Knights Templar
It was officially endorsed by the Roman Catholic Church around 1129, and became a favored charity by many Christians and grew fast in membership and power. Templar knights wore white mantles quartered by a red cross and were among the most skilled fighting units of the Crusades. Those members of the Order that did not fight managed a large economic infrastructure throughout Christendom, innovating financial techniques that were an early form of banking, and building many fortifications throughout the Mediterranean and the Holy Land.