What are the seven seas? | Library of Congress
https://www.loc.gov/everyday-mysteries/geography-anthropology-recreation/item/what-are-the-seven-seas/
WEBNov 19, 2019 · Most current sources state that “seven seas” referred to the Indian Ocean, Black Sea, Caspian Sea, Adriatic Sea, Persian Gulf, Mediterranean Sea, and the Red Sea. Chart of the Mediterranean Sea, 1817. Geography & Map Division, Library of Congress.
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