Piotr Wawrzeniuk was long-time drummer in Swedish metallers Therion. He replaced initial drummer Oskar Forss.
In 1997 he was replaced by Wolf Simons. After leaving Therion, Piotr became vocalist in classic doom metal-band Serpent.
Piotr Wawrzeniuk is also known as drummer in Carbonized. The band was formed by Lars Rosenberg in 1988, and featured Dismember vocalist Matti Karki in its early stages. The trio was completed by Therion mainmain Cristofer Johnsson, who originally agreed to only perform session guitarwork but eventually became a full-time member. Both Rosenberg and Wawrzeniuk were later recruited by Johnsson into Therion for a time, and the two also paired up in the doom band Serpent.