Birtha (Mesopotamia) bastions are quite traceable. There are the ruins of a vaulted secret staircase, leading down from the heart of the citadel to the water's edge. Birtha (Mesopotamia) Birtha () was an ancient fortress on the river Tigris, which was said to have been built by Alexander the Great. It would seem, from the description of Ammianus, to have resembled a modern fortification, flanked by bastions, and with its approaches defended by out-works. Shapur II here closed his campaign in 360, and was compelled to retire with considerable loss. D'Anville and Edward Gibbon both identify Birtha as modern-day Tikrit, Iraq. The
Mesopotamia, Greece largest is that of the cathedral of St. Peter and St. Paul. The oldest church is the church of St.Constantine and St.Helen which contains the village cemetery, and the church of Saint Demetrios. The chapel of St. George is a few kilometers outside of the village. There is a Cultural Center as well. This center supports and preserves the λοψαλ culture. It holds annual ceremonies on May 19, a day of remembrance for the population, at the Forest of Mesopotamia near the Aliakmon River. Finally, the town also has bars and nightclubs. Mesopotamia is a rural residential community. Its economy