A collegium (plural collegia, "joined by law") may be:

• collegium (ancient Rome), a term applied to any association with a legal personality in ancient Rome.
  • a significant example is the College of Pontiffs whose members were the highest-ranking priests of the state religion.
• a Latinized form of the Ancient Greek term hetaireia.
• collegium (ministry), in Imperial Russia, the equivalent of a ministry or government department.
• Collegium (school), in France, refers to a kind of college.
• In Scandinavia, an outdated spelling of kollegium and refers to dormitories, e.g.
  • Hassagers Collegium
  • Collegium Mediceum
• Harvard-Radcliffe Collegium Musicum

Also, the word college is derived from collegium.

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