 Among the subjects were law, philosophy, medicine, arithmetic, geometry, astronomy, music and rhetoric.In 429, Theodosius appointed a commission to collect all of the laws since the reign of Constantine I, and create a fully formalized system of law.This plan was left unfinished, but the work of a second commission that met in Constantinople, assigned to collect all of the general legislations and bring them up to date, was completed; their collection was published as the "Codex Theodosianus" in 438.