Theodosius II (Greek: , translit. Theodosios; 10 April 401 28 July 450), also known as Theodosius the Younger, (Latin: Theodosius minor) was Roman emperor for most of his life, proclaimed Augustus as an infant in 402 and ruling as the eastern Empire's sole emperor after the death of his father Arcadius in 408. His reign was marked by the promulgation of the Theodosian law code and the construction of the Theodosian Walls of Constantinople. He also presided over the outbreak of two great Christological controversies, Nestorianism and Eutychianism.

The Imperial University of Constantinople, sometimes known as the University of the Palace Hall of Magnaura (Greek: Πανδιδακτήριον τῆς Μαγναύρας), was an Eastern Roman educational institution that could trace its corporate origins to 425 AD, when the emperor Theodosius II founded the Pandidakterion (Byzantine Greek: Πανδιδακτήριον).The Pandidakterion was refounded in 1046 by Constantine IX Monomachos who created the Departments of Law (Διδασκαλεῖον τῶν Νόμων) and Philosophy (Γυμνάσιον).At the time various economic schools, colleges, polytechnics, libraries and fine arts academies also operated in the city of Constantinople.