The Collegium Maius (Latin for "Great College") located in Kraków Old Town, Poland, is the Jagiellonian University's oldest building, dating back to the 14th century.

The Collegium Maius was rebuilt in the late 15th century as a late-Gothic structure surrounding a large courtyard bordered with arcades.

In the 1490s the Collegium Maius counted among its students Nicolaus Copernicus, the Renaissance astronomer and polymath who would revolutionize European ideas about the universe.

The Collegium Maius Museum features lecture rooms, communal halls, professors’ quarters, a library and a treasury containing rectors' Gothic maces and the Jagiellonian globe.

Exhibits also include medieval scientific instruments, globes, paintings, collectibles, furniture, coins and medals.