The Ecstasy of Saint Theresa (EOST) is a Czech band, formed in 1990 by Jan Muchow, Jan Gregar, Petr Wegner and Irna Libowitz. Early shoegaze influences included Siouxsie and the Banshees, Cocteau Twins, and My Bloody Valentine.

The band released the EP Pigment in 1991. This album, along with 1992's Susurrate, featured a punky feedback-drenched psychedelic rock sound.