Marco Polo,
Marco Polo (September 15, 1254 – January 9, 1324 at earliest, but no later than June 1325) was a trader and explorer from the Venetian Republic who gained fame for his worldwide travels, recorded in the book Il Milione ("The Million" or The Travels of Marco Polo) also known as Oriente Poliano (the Orient of the Polos) and the Description of the World.
Polo, together with his father Niccolò and his uncle Maffeo, was one of the first Westerners to travel the Silk Road to China (which he called Cathay, after the Khitan) and visit Kublai Khan, a grandson of Genghis Khan and the founder of the Yuan Dynasty.

Niccolò and Maffeo Polo leaving Constantinople for the east, in 1259.
The Polo name originally did not belong to a family of explorers, but to a family of traders. Marco Polo's father, Niccolò (also Nicolò in Venetian) and his uncle, Maffeo (also Maffio), were prosperous merchants who traded with the East. They were partners with a third brother, named Marco il vecchio (the Elder). The three brothers were all Venetian merchants who established trading posts in Constantinople, Sudak in the Crimea, and in a western part of the Mongol Empire.
In 1252, Niccolò and Maffeo left Venice for Constantinople, where they resided for several years. The two brothers lived in the Venetian quarter of Constantinople, where they enjoyed political chances and tax relief because of their country's role in establishing the Latin Empire in the Fourth Crusade of 1204. However, the family judged the political situation of the city precarious, so they decided to transfer their business northeast to Soldaia, a city in Crimea, and left Constantinople in 1259. Their decision proved wise. Constantinople was recaptured in 1261 by Michael Palaeologus, the ruler of the Empire of Nicaea, who promptly burned the Venetian quarter. Captured Venetian citizens were blinded, while many of those who managed to escape perished aboard overloaded refugee ships fleeing to other Venetian colonies in the Aegean Sea.
As their new home on the north rim of the Black Sea, Soldaia had been frequented by Venetian traders since the 12th century. The Mongol army sacked it in 1223, but the city had never been definitively conquered until 1239, when it became a part of the newly formed Mongol state known as the Golden Horde. Searching for better profits, the Polos continued their journey to Sarai, where the court of Berke Khan, the ruler of the Golden Horde, was located. At that time, the city of Sarai — already visited by William of Rubruck a few years earlier — was no more than a huge encampment, and the Polos stayed for about a year. Finally, they decided to avoid Crimea, because of a civil war between Berke and his cousin Hulagu or perhaps because of the bad relationship between Berke Khan and the Byzantine Empire. Instead, they moved further east to Bukhara, in modern day Uzbekistan, where the family lived and traded for three years.
They were invited by an envoy of Hulagu (right) to travel east to visit Kublai Khan.
In 1264, Nicolò and Maffio joined up with an embassy sent by the Ilkhan Hulagu to his brother Kublai Khan. In 1266, they reached the seat of the Kublai Khan at Dadu, present day Beijing, China.
In his book, Il Milione, Marco explains how Kublai Khan officially received the Polos and sent them back with a Mongol named Koeketei as an ambassador to the Pope. They brought with them a letter from the Khan requesting 100 educated people to come and teach Christianity and Western customs to his people and oil from the lamp of the Holy Sepulcher. The letter also contained the paiza, a golden tablet a foot long and three inches (76 mm) wide, authorizing the holder to require and obtain lodging, horses and food throughout the Kublai Khan's dominion. Koeketei left in the middle of the journey, leaving the Polos to travel alone to Ayas in the Armenian Kingdom of Cilicia. From that port city, they sailed to Saint Jean d'Acre, capital of the Kingdom of Jerusalem.
Niccolo and Maffeo Polo remitting a letter from Kubilai to Pope Gregory X in 1271.
The long sede vacante — between the death of Pope Clement IV, in 1268, and the election of Pope Gregory X, in 1271 — prevented the Polos from fulfilling Kublai’s request. As suggested by Theobald Visconti, then papal legate for the realm of Egypt, in Acre for the Ninth Crusade, the two brothers returned to Venice in 1269 or 1270, waiting for the nomination of the new Pope.










