2009. Tetragon, successor of Trikolon, were founded in Osnabruck (Lower Saxony) in the spring of 1971. They released their first and only LP, "Nature", in that very year. It came out as CD on Musea in 1995..

2011. Tetragon, successor of Trikolon, were founded in Osnabrueck (Lower Saxony) in the spring of 1971. They released their first and only LP, "Nature", in that very year. It came out as CD on Musea in 199..

2012. Tetragon from Osnabruck in Lower Saxony played organ-driven instumental jazz-rock and were thus somewhat reminiscent of Colosseum. Their first LP, "Nature", was released in 1971 and is today scarcely..

1995. An ecology-inspired Krautrock album (1971) from a short-lived group comprised of German school-chums, some of whom had recorded an LP as Trikolon. Tetragon did not conform to any predetermined musical style: t..

1995. An ecology-inspired Krautrock album (1971) from a short-lived group comprised of German school-chums, some of whom had recorded an LP as Trikolon. Tetragon did not conform to any predetermined musical style: t..

2017. On vinyl and limited to 550 numbered copies, this is a reissue of a Swiss heavy-prog/kraut monster from 1976, originally released in a hand-made private edition of 200 copies. The original album contains four ..

2023. Trikolon was a gifted trio from Osnabrück. As precursor of Tetragon, they played a very varied and strongly influenced progressive rock. They were influenced by classic rock and blues. Their only LP 'Clus..