Twenty Sixty Six & Then was a German progressive rock band that emerged in the vibrant Krautrock scene of the early 1970s. The formation of the group took place in Mannheim in 1970, and it consisted of a melting pot of musicians with diverse backgrounds and musical influences. The lineup included vocalist Geff Harrison, guitarists Gagey Mrozeck and Veit Marvos, bassist Dieter Bauer, drummer Konstantin Bommarius, and keyboardist Steve Robinson, marking a collective that aimed to fuse the hard rock energy with the progressive complexity that was burgeoning in the rock scene at the time.

Despite a brief period of activity, Twenty Sixty Six & Then made a significant impact with their ambitious and forward-thinking sound. Their most renowned work is the album "Reflections on the Future", released in 1972, which has since become a cult classic in progressive rock circles. The record is characterized by its inventive song structures, virtuoso performances, and philosophical lyricism that aimed to reflect on the human condition and the vast possibilities of the future—a theme presaged by the band's forward-thinking name. Although they disbanded shortly after their debut album, the legacy of Twenty Sixty Six & Then endured, leading to reissues and restored interest in their work from collectors and new fans fascinated by the rich tapestry of 70s underground rock. The release of other tracks, like "Twenty Sixty Six And Then" and "Butterking," in compilations and retrospectives, has helped to bolster their reputation as a gem of their era, offering a glimpse into the ambitious spirit and musical experimentation that defined their short-lived and yet remarkable journey.