Wenceslaus (also Wenceslas; Czech: Václav IV.; German: Wenzel, nicknamed der Faule ("the Idle"); 26 February 1361 – 16 August 1419) was, by inheritance, King of Bohemia (as Wenceslaus IV) from 1363 and by election, German King (formally King of the Romans) from 1376.
He was the third Bohemian and fourth German monarch of the Luxembourg dynasty.
Wenceslaus was deposed in 1400 as King of the Romans, but continued to rule as Bohemian king until his death.