Dream Theater
Dream Theater est grex musicus Americano-Canadensis a Ioanne Petrucci, Ioanne Myung et Michaele Portnoy anno 1985 conditus (nomine Majesty). Genus musicae eius plerumque describitur metallum progressivum. Septembri 2010 tympanista Michael Portnoy gregem reliquit, qua re Dream Theater successorem quaerere coepit, quoad anno postero Michaelem Mangini assumpserunt tympanistam.

Sodales 
Ioannes Petrucci: cithara
Ioannes Myung: cithara gravis
Iacobus LaBrie: vox
Jordan Rudess: clavile
Michael Portnoy: tympana

Discographia selecta 
When Dream and Day Unite, 1989
Images and Words, 1992
Awake, 1994
Falling into Infinity, 1997
Metropolis Pt. 2: Scenes from a Memory, 1999
Six Degrees of Inner Turbulence, 2002
Train of Thought, 2003
Octavarium, 2005
Systematic Chaos, 2007
Black Clouds and Silver Linings, 2009
A Dramatic Turn of Events, 2011
Dream Theater, 2013
The Astonishing, 2016
Distance over Time, 2019
A View from the Top of the World, 2021

Nexus externi 
 Situs publicus

Greges musici Civitatum Foederatarum
Greges musici Canadae
!
Constituta 1985