About Piotr Wiwczarek
Piotr Paweł Wiwczarek (born 22 October 1965 in Olsztyn, Poland), also known as Peter, (ex nickname Behemoth) is a Polish musician who is the vocalist and lead guitarist for the death metal band Vader, as the only constant member of the band since its inception. He has also collaborated with Kazimierz "Para" Paraszczuk on his tribute album, Bandid Rockin', and is the producer of several of Vader's releases. He was also the founder and guitarist of a side-project, named Panzer X. Panzer X was active between 2004 and 2007. After giving a single concert in 2012, they disbanded again that same year. Wiwczarek also became a producer for the first time in 1999, when producing the Polish death metal band Decapitated's first release, Winds of Creation.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.