"Knights of Cydonia" is a song by English alternative rock band MUSE and is the closing track on their 2006 album Black Holes and Revelations. The song's title comes in part from the region of Mars named Cydonia, famous for the "face on Mars".

The radio edit version was first aired on KROQ-FM radio on 6 June 2006, and released to other radio stations in the United States on 12 June 2006. The song was released as the third single from Black Holes & Revelations in the UK on 27 November 2006, de...