Besides the above works and a commentary against various sects of Monophysites (Severians, Theodosians, Cainites and Acephali) he left eleven discourses in defence of Pope Leo I and the Council of Chalcedon, also a work against the Agnoetae, submitted by him before publication to Pope Gregory I, who after some observations authorized it unchanged.
At the instance of Theodore Ascidas, and with the ostensible purpose of reuniting to the Church the Acephali, a sect of Monophysites, Justinian was induced to censure the "Three Chapters".