The Theater Equation is a 2016 live album and DVD/BluRay by Arjen Anthony Lucassen's progressive rock/metal rock opera project Ayreon. The Theater Equation consists of a live performance, with cast, choir and small orchestra, of the 2004 album The Human Equation. It marks the first time an Ayreon album was played live entirely, and the first Ayreon live release.

Ayreon: The Theater Equation

Ayreon Universe is Ayreon live in concert for the first time ever, organized and arranged by Arjen A. Lucassen and Joost van den Broek.
 This performance was filmed during the second show in Tilburg on Saturday September 16th 2017.  Joining Arjen Lucassen for this concert were guest perfomers Floor Jansen (Nightwish/After Forever), Damian Wilson (Headspace), Hansi Kursch (Blind Guardian), Tommy Karevik (Kamelot), Anneke Van Giersbergen (The Gathering/Vuur), Marco Hietala (Nightwish/Tarot) Jonas Renkse (Katatonia).