First, there were some strange singles in the late Sixties. Then "Space Hymns," the first complete work, emerged in 1971, in the dimming of the original psychedelic era.
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Prog Folk is a progressive rock music sub-genre. Top Prog Folk artists: Jethro Tull, Strawbs, Mostly Autumn, Gryphon, Ian Anderson, Dead Can Dance, Los Jaivas, Comus, The Decemberists, Blackmore's Night, Roy Harper, Iona, Aquarium, The Pentangle, Spirogyra, and more.