CIRCA: is a progressive rock supergroup based in California that is comprised of four original musicians from one of the most famous bands in the history of progressive rock, Yes. The band was originally an on-again, off-again project between its members since the 1980s, however, in 2006 the project was finally able to get off the ground with CIRCA:'s debut album Circa 2007 being released to widespread acclaim a year later. As of today, CIRCA: continues to record new albums and tour throughout the US--ensuring that progressive rock is still alive and kicking in the 21st Century.