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.
Mare Cognitum Apollo 12 demonstrate that the volcanic activity that formed the lunar mare did not occur all at once across the lunar surface, but rather took place at different times at different locations. Mare Cognitum Mare Cognitum ("The Sea that has Become Known") is a lunar mare located in a basin or large crater which sits in the second ring of Oceanus Procellarum. To the northwest of the mare is the Montes Riphaeus mountain range, part of the rim of the buried crater or basin containing the mare. Previously unnamed, the mare received its name in 1964 in reference to its