Topic summary
St. Andrew

Extracted from the Wikipedia article Andrew the Apostle.
Spain
St. Andrew was the patron saint of the Dukes of Burgundy. A form of St. Andrew's cross called the Cross de Bourgogne was used as the flag of the Duchy of Burgundy, and after the duchy was acquired by Spain, by the Spanish Crown, and later as a Spanish naval flag and finally as an army battle flag up until 1843. Today, it is still a part of various Spanish military insignia and forms part of the coat of arms of the king of Spain.