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Probably born in Venice around 1254 CE, Marco Polo was raised by his aunt and uncle after his mother died. His father, Niccolo, was a Venetian merchant who left before Marco was born to trade in the Middle East. Niccolo and his brother Maffeo passed through much of Asia and met with Mongol emperor Kublai Khan who reportedly invited them to be ambassadors. In 1269, Niccolo and Maffeo returned to Venice, meeting Marco for the first time.<br/><br/>

In 1271, Marco Polo, aged 17, with his father and his uncle, set off for Asia, travelling through Constantinople, Baghdad, Persia, Kashgar, China and Burma. They returned to Venice 24 years and 15,000 miles later with many riches. Upon their return, Venice was at war with Genoa, and Marco Polo was imprisoned. He spent the few months of his imprisonment dictating his adventures to a fellow inmate, Rustichello da Pisa, who incorporated the tales into a book he called 'The Travels of Marco Polo'. The book documented the use of paper money and the burning of coal, and opened European eyes to the wonders of the East.
Outline map of the major trade routes between Europe and Asia around 100 CE, including the Silk Road, the Incense Road and the sea routes between Europe, Arabia, India and China. Geographical labels for regions are adapted from the Geography of Ptolemy (c. 150 CE), some trading centre names date from later (c. 400 CE).
Dilmun (sometimes transliterated Telmun) is a land mentioned by Mesopotamian civilizations as a trade partner, a source of the metal copper, and an entrepôt of the Mesopotamia-to-Indus Valley Civilization trade route.<br/><br/>

Although the exact location of Dilmun is unclear, it might be associated with the islands of Bahrain, the Eastern Province of Saudi Arabia, Qatar, the United Arab Emirates, Oman and the nearby Iranian coast of the Arab or Persian Gulf.
The Persian Royal Road was an ancient highway reorganized and rebuilt by the Persian king Darius the Great (Darius I) of the Achaemenid Empire in the 5th century BC. Darius built the road to facilitate rapid communication throughout his empire.<br/><br/>

The course of the road has been reconstructed from the writings of Herodotus, archeological research, and other historical records. It began in the west in Sardis (on the Aegean coast of Lydia, about 60 miles east of İzmir in present-day Turkey), traveled east through what is now the middle northern section of Turkey, (crossing the Halys according to Herodotus) and passed through the Cilician Gates to the old Assyrian capital Nineveh (present-day Mosul, Iraq), then turned south to Babylon (near present-day Baghdad, Iraq).<br/><br/>

From near Babylon, it is believed to have split into two routes, one traveling northeast then east through Ecbatana and on along the Silk Road, the other continuing east through the future Persian capital Susa (in present-day Iran) and then southeast to Persepolis.
For thousands of years, most seawater pearls were retrieved by divers working in the Indian Ocean, in areas like the Persian Gulf, the Red Sea, and in the Gulf of Mannar. In the 14th-century Arabian Sea, the traveller Ibn Battuta provided the earliest known description of pearl diving by means of attaching a cord to the diver's waist.<br/><br/>

Before the beginning of the 20th century, pearl hunting was the most common way of harvesting pearls. Divers manually pulled oysters from ocean floors and river bottoms and checked them individually for pearls. Not all mussels and oysters produce pearls. In a haul of three tons, only three or four oysters may produce perfect pearls.