Gregorian might refer to:

• Gregorian calendar
• Gregorian chant
• Gregorian reform
• Gregorian (band)
• Gregorian University, Rome
• Brotherhood of Saint Gregory
• Gregorian telescope
• The Armenian Apostolic Church is sometimes called the Gregorian Church
• Gregorian Bivolaru is the founder of the Movement for Spiritual Integration into the Absolute (MISA)

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