Tyranny of Souls is the sixth studio album by Iron Maiden vocalist Bruce Dickinson, released on 23 May 2005 through Sanctuary Records.

Z, bassist Ray "Geezer" Burke, and keyboardist Maestro Mistheria all contributed to vocalist Rob Rock's 2003 release, Eyes of Eternity.

Drummer Dave Moreno and bassist Juan Perez were members of Z's Latin rock band Tribe of Gypsies at the time.

"Navigate the Seas of the Sun" is inspired by Erich Von Däniken's theory about extraterrestrial presence on Earth long ago and about man dealing with that in the future.

[citation needed] The title track is somewhat based on Shakespeare's tragedy MacBeth, and includes direct quotes and lines from the play throughout the song.