The Myths and Legends of King Arthur and the Knights of the Round Table is the third solo album from the English keyboardist Rick Wakeman, released in April 1975 on A&M Records. His second concept album, it is based on the legend of King Arthur and various figures and events associated with him. After he suffered from a heart attack, Wakeman started to write the album during his recovery in hospital. Wakeman recorded with the New World Orchestra, the English Chamber Choir, and his five-piece band, the English Rock Ensemble.
King Arthur received mostly positive reviews, though some labelled it a symbol of progressive rock excess. It reached No. 2 on the UK Albums Chart and No. 21 on the US Billboard 200. It was certified Gold in the US, Brazil, Japan, and Australia. The album was promoted with a world tour in 1975 that included three shows at Wembley Arena that were performed on ice, the last time it was performed in its entirety until 2016. The album was reissued in 2015 with a simulated Quadrophonic mix, and re-recorded in 2016 with additional parts previously removed from the original score due to time constraints.
Much of the album was written while Wakeman, at 25 years old, recovered from his first of three minor heart attacks at Wexham Park Hospital. After a specialist advised him to stop playing and retire, he ignored it, and wrote "The Last Battle" on the same night.
The tour in support of the album included a theatrical production of King Arthur on Ice, which sold out three performances at Wembley Arena in London, but ultimately lost money. The production was ranked No. 79 on "100 Greatest Shocking Moments in Rock and Roll" by VH1.
Following the 2012 re-recording of Journey to the Centre of the Earth, Wakeman was booked to perform King Arthur in its entirety at the O2 Arena in London as part of the Stone Free Festival on 19 June 2016, the first performance of the album in its entirety since 1975. The album was originally written as a double album, but certain arrangements had to be cut due to the time limitations of vinyl. A direct-to-fanPledgeMusic fund was launched on 9 February 2016 to help fund the re-recording of a new, 88-minute version of King Arthur recorded at Angel Studios with the English Chamber Choir, Wakeman's rock band the English Rock Ensemble, and conductor Guy Protheroe and Ann Manly producing the orchestral scores. Roger Dean was commissioned to design its artwork.