Beauceant: black-and-white silk rectangle, the Templars’ battle banner; “Bosean” also their battle cry. Bosean (Bauseant) translated into Latin from “Ok” means Sancta Rosa, Holy Rose. Claimed 70% white/30% black and “golden ratio” proportions. Meaning unknown; black may be sins of the world, white the purity the Knights Templar offered. While it flew, knights could not retreat or end battle.