Pantheist (stylised as Pantheïst) are a Belgian and British funeral doom band formed in 2000 by Kostas Panagiotou.

The following year, Caure and Strik left the band, citing musical differences, and were replaced by Kris Villez on drums and Wim Boey on bass.

[2] For their second album, Amartia, Pantheist was joined by Mark Bodossian and Andy Semmens of Esoteric on bass and drums/vocals respectively, as session musicians.

[4] In 2016, frontman Kostas Panagiotou released a 145-page science fiction novel, Events (Or Professor Losaline’s Extraordinary Journey into the Unknown), alongside his solo EP Chapters.

[6] Released in 2018,[7] the album marked a return to the band's traditional funeral doom and death-doom style, though it still retained some elements of progressive and neofolk metal.