 Complete the following phrase:  The coat of arms representing the grandmaster Hochmeisterwappen is shown with a golden cross fleury or cross potent superimposed on the black cross, with the imperial eagle as a central inescutcheon. The golden cross fleury overlaid on the black cross became widely used in the 15th century. A legendary account attributes its introduction to Louis IX of France, who is said to have granted the master of the order this cross as a variation of the Jerusalem cross, with the fleur-de-lis symbol attached to each arm, 