Olaus Magnus' Carte marina: Behold the Map of the Sea! This 16th century masterpiece by Swedish priest and cartographer Olaus Magnus is one of the oldest known maps of the Scandinavia and the Baltic Sea. He created the original in Rome in 1539 and today only two copies are known to exist. It's a remarkable map due to its artistic whimsy, the sheer number of sea monsters populating its waters, as well as its possible economic influence. Some historians theorize the monsters in the Norwegian Sea were intended to scare away foreign fishermen.