John of Bohemia (d. 1346)
John the Blind or John of Luxembourg (Luxembourgish: Jang de Blannen; German: Johann der Blinde; Czech: Jan Lucemburský; 10 August 1296 – 26 August 1346), was the Count of Luxembourg from 1313 and king of Bohemia from 1310 and titular king of Poland. He is well known for having died while fighting in the Battle of Crécy at age 50, after having been blind for a decade. In his home country of Luxembourg he is considered a national hero. Comparatively, in the Czech Republic, Jan Lucemburský is often recognized for his role as the father of Charles IV, Holy Roman Emperor, one of the more significant Czech kings and simultaneously one of the leading Holy Roman Emperors.