Also known by the name Nergal, he was the frontman of the black and death metal band Behemoth.
He studied six years of history, including one year of Latin, at the University of Gdańsk.
He chose his stage name after a Babylonian deity.
He called off his wedding engagement and parted ways with Dorota Rabczewska, the Polish singer known as Doda, in 2011.
In 2003, Behemoth toured with Chris Barnes' band Six Feet Under.