"According to one theory, the six-pointed "shield of David" which adorns the modern Israeli flag, started to become a national symbol with David al-Roy's crusade. "Ever since," writes Baron, "it has been suggested, the six-cornered 'shield of David', theretofore mainly a decorative motif or a magical emblem, began its career toward becoming the chief national-religious symbol of Judaism. Long used interchangeably with the pentagram or the 'Seal of Solomon', it was attributed to David in mystic and ethical German writings from the thirteenth century on, and appeared on the Jewish flag in Prague in 1527.""