Quadrivium
Woman teaching geometry. Illustration at the beginning of a medieval translation of Euclid's Elements, (c. 1310)
From the time of Plato through the Middle Ages, the quadrivium (plural: quadrivia was a grouping of four subjects or arts—arithmetic, geometry, music, and astronomy—that formed a second curricular stage following preparatory work in the trivium, consisting of grammar, logic, and rhetoric.