In 1375 Emperor Charles IV bestowed the nobiliary style "Durchlauchtig" (Most Serene Highness) upon the seven Prince-electors designated by the Golden Bull of 1356. As from 1664 Emperor Leopold I vested all Imperial Princes with the title, it became so common that the Electors like the Archdukes of Austria began to use the superlative address "Durchlauchtigst". In the German Empire, the style of "Serene Highness" was usually held by princes of lower rank than those who were entitled to "Highness" (exceptions were the Wettin cadets of the Ernestine duchies), "Grand Ducal Highness", "Royal Highness", and "Imperial Highness". Therefore, if a woman entitled to the treatment of "Royal Highness" married a man who was addressed only as "Serene Highness", the woman usually retained her pre-marital style.