An art rock supergroup whose members are closely associated with prog giants Yes, CIRCA: debuted in 2007 with the aptly named Circa: 2007. Initially comprised of Alan White (drums), Tony Kaye (Hammond, keyboards), Billy Sherwood (vocals, guitar), and guitarist Jimmy Haun, the band issued two more albums before coalescing around a lineup consisting of Sherwood, Kaye, drummer Scott Connor, and bassist Rick Tierney. CIRCA: released their fourth LP, Valley of the Windmill, in 2016.