Charles IV was Holy Roman Emperor from 1355 until his death in 1378. He was elected King of Germany in 1346 and became King of Bohemia that same year. He was a member of the House of Luxembourg from his father's side and the Bohemian House of Přemysl from his mother's side; he emphasized the latter due to his lifelong affinity for the Bohemian side of his inheritance, and also because his direct ancestors in the Přemyslid line included two saints. May 14, 1316 – November 29, 1378; died at 62. Alive at the same time as Geoffrey Chaucer, Ibn Battuta, William of Ockham, Giotto, and Ibn Taymiyyah. Wiki link