Polish gothic rock band from Warsaw. It was formed in 1988 by Przemysław Guryn, Jacek Skirucha, and the vocalist Anja Orthodox. Despite many changes in the band's line-up it has created a characteristic sound. Orthodox is the only member of the original line-up, performing continuously for over 30 years. The band is called one of the forerunners of gothic and atmospheric rock in Poland, they are also under the influence of music styles such as new and cold wave or even heavy metal. Many other groups like Delight, Moonlight or Artrosis said they took their inspirations from Closterkeller.