Yoke and arrows
The yoke and arrows (Spanish: Yugo y flechas) or the yoke and the bundle of arrows (Spanish: Yugo y haz de flechas) is a symbolic badge dating back to the dynastic union of Spain's Catholic monarchs Ferdinand II of Aragon and Isabella I of Castile. Subsequent Catholic monarchs continued to use it on their shields to represent a united Spain and symbolize "the heroic virtues of the race".