Mesopotamia, Argentina Mesopotamia, Argentina La Mesopotamia or Región Mesopotámica is the humid and verdant area of north-east Argentina, comprising the provinces of Misiones, Entre Ríos and Corrientes. The landscape and its characteristics are dominated by two rivers, the Paraná and the Uruguay. When Spanish settlers came to the area, the two parallel rivers and the lush area between them drew comparisons to Mesopotamia (Greek: Μεσοποταμία "land between rivers") in modern-day Iraq, and it was decided to name the Argentine region for the Iraqi region. The region shares many of its ecological features with neighboring regions of Argentina and with parts of Brazil,
Mesopotamia (theme) Mesopotamia (theme) Mesopotamia () was the name of a Byzantine theme (a military-civilian province) located in what is today eastern Turkey. It should not be confused with the region of Mesopotamia or with the older Roman and early Byzantine province of Mesopotamia. The Byzantine theme was located between the rivers Arsanias (modern Murat) and Çimisgezek. The theme was formed probably between 899 and 911, when Emperor Leo VI the Wise (r. 886–912) appointed the former "strategos" of the Charsianon, named Orestes, as its governor. Most of the province was formed out the Armenian principality of Takis, ruled by the chieftain