Gregorian might refer to: Named for Pope Gregory I: Gregorian chant Brotherhood of Saint Gregory Gregorian reform (Pope Gregory VII) Named for Pope Gregory XIII Gregorian calendar Gregorian University, Rome The Armenian Apostolic Church, sometimes called the Gregorian Church (Saint Gregory the Illuminator) Gregorian telescope (James Gregory) Gregorian Bivolaru, founder of the Movement for Spiritual Integration into the Absolute (MISA) Gregorian (band) Gregorian Satellite Dish Antennas… (More on Gregorian)