Ultimately, a system of nine tinctures was developed, with dukes, earls, and barons having their arms blazoned by gemstones, and princes, kings and emperors having arms blazoned by the planets. It is worth noting that the Austrian troubadour and herald Peter Suchenwirt (c. 1320 – 1395) used gemstones to designate the tinctures even earlier (c. 1355) in the coat of arms of the Hungarian king Louis the Great (1342–1382). Konrad von Würzburg (c. 1230 – 1287) also mentioned coats of arms made of gemstones in his poem "Turnier von Nantheiz" (c. 1258), for example describing the arms of the king of England as an escutcheon covered with Arabian gold with leopards made of rubies (lines 310–320).