History of the Mediterranean region Alexandria. Mesopotamia became a fringe border region between the Roman Empire and the Persians. When Augustus founded the Roman Empire, the Mediterranean sea began to be called "Mare Nostrum" (Latin: "Our Sea") by the Romans. Their empire was centered on this sea and all the area was full of commerce and naval development. For the first time in history, an entire sea (the Mediterranean) was free of piracy. For several centuries, the Mediterranean was a "Roman Lake", surrounded on all sides by the empire. The empire began to crumble, however, in the fifth century and Rome collapsed after 476 CE.
Exultavit cor nostrum Exultavit cor nostrum Exultavit cor nostrum is a letter, also known as a Papal bull, from Pope Urban IV to the Mongol Ilkhanate leader Hulagu in 1263/1264. The letter was evidently in response to a message brought to Urban by John the Hungarian, who claimed to be the Mongol envoy (it was not uncommon for individuals to present themselves as envoys, even when they were not). According to John, Hulagu desired to become a Christian, and requested that Urban send a representative who would help to baptise him. Pope Urban responded with the "Exultavit", which indicated that Urban had heard