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The RMS Titanic
No ocean was discovered then. "Western" explorers such as the Vikings had been sailing the North Atlantic ocean fore some time before that, and the South Atlantic was first sailed by the Phoenicians some 200 years BC and its existence was well known to the ancient Greeks and Romans. All the other oceans (like the Indian Ocean and the Pacific) were discovered by Westerners in the 15th and early 16th century.
Actually, there were several powerful maritime powers, even in Europe. In the Eastern Mediterranean, the Ottoman Empire had a navy that arose during the 15th century and was probably the greatest power of the area by the end. Genoa had lost most of its maritime ability by the 15th century. Venice were quite powerful at the time, especially early in the 15th century, and was still challenging the Ottoman Turks at the end of it. Portugal was developing as a powerful maritime nation in the Atlantic Ocean. In the Baltic, the most powerful organization of the 15th century was the Hanseatic League.
Sixteenth century.
The 15th century.The 15th century.The 15th century.The 15th century.The 15th century.The 15th century.The 15th century.The 15th century.The 15th century.The 15th century.The 15th century.
1494 fell in the 15th Century.
1492 is in the 15th Century.
The 15th century
The 15th century was the century which lasted from 1400 to 1499.
Diaspora
the population of Spain in the 15th century was 178,000,000,000
They didn't have cars in the 15th Century.