1 Rouble Mikalai Radziwill 'Chorny'

Mikalai Radziwill "Chorny" — the epithet meaning "the Black" — was the most powerful magnate in the Grand Duchy of Lithuania at the height of his influence in the mid-16th century, serving as Grand Chancellor and wielding political authority that rivaled the Jagiellonian monarchy itself. He was the principal patron behind the 1563 Brest Bible, the first complete printed Bible in any East Slavic language, funded entirely from his personal fortune. His conversion to Calvinism made him the engine of the Reformation across Lithuanian noble society, a religious shift that largely reversed within a generation of his death in 1565.