Theodosius 's major problems were with the Goths and his western frontier , which kept him away from Constantinople . He became notorious for his perpetration of the Massacre of Thessalonica in 390 , and had to deal with all the problems going on in the west ( see above ) . On the eastern front he came to an arrangement with the Sassenids in 384 over Armenia establishing a firm frontier , but essentially agreeing to give up most of Greater Armenia . This arrangement proved relatively stale over a long time . Despite all these events he was able to contribute considerably to Anatolian life . The great obelisk that he had transported from Alexandria to Constantinople in 390 still stands today . He rebuilt Constantine 's great Forum in 393 and today it also bears his name . He also played a part in religious life , issuing an edict in 380 that established the faith of the bishops of Rome and Alexandria as the official version of Christianity , that was still very heterogeneous . He was baptised and appointed the Patriarch of Constantinople . Then in 381 he continued Constantine 's work in Nicaea by calling a new ecumenical council in Constantinople to entrench orthodoxy and repair relations with Rome
Massacre of Thessalonica
Massacre of Thessalonica
Classical Anatolia