Saint George was depicted as a crusader knight during this time, but the red cross had no particular association with him. A crusader-era fresco in the crypt of Trani cathedral shows Saint George wearing a white cross on a red surcoat. The white-on-red version was chosen as the "Reichsbanner" ("imperial banner") by the German crusaders in the 12th century, and Emperor Frederick II used it in his European campaigns of the 1250s after he had returned from the crusades. It continued to be used as the "Reichssturmfahne" ("imperial war flag") of the Holy Roman Empire, eventually giving rise to the flag of Savoy and the present-day flags of Switzerland and Denmark).