Charles IV was the emperor of the Holy Roman Empire from 1355 to 1378. He was the father of Sigismund of Hungary and Wenceslaus of Bohemia.
Charles was known for his wise and peaceful leadership style, even in the difficult times of the plague and severe weather storms. The empire was relatively peaceful and prosperous while he was the emperor. And Charles was a beloved King, especially in Bohemia.
Charles IV is a historical character.