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Muslims and Italians!
Because of its location. It controlled both land and sea trade and military routes.
Most of the raw materials that exchanged hands in the East African trade came from Africa.
spices
spices, foodstuffs, silk, and timber
So China can trade and share goods with the Middle East, Middle west, and Europe
Constantinople was located at the crossroads of Europe and Asia, making it a strategic city for trade and military purposes. This location allowed it to control key trade routes between the two continents and serve as a gateway between East and West.
Constantinople was in a perfect strategic position. It was easily defendable. But the reason it grew wealthy was its position regarding trade. The Gateway of Europe sat astride the East-West and Europe-Asia trade routes. Fur, amber, and similar came down the great rivers of Eastern Europe. Metals and wool came from Europe. But the greatest wealth came from the East. Incense, Spice, Silk, Ivory, Gems, Carpets, etcetera flowed across the Silk Road from China, and from the Middle Eastern states. North African trade also came to the city. Of course, all this trade... Could be taxed! The Byzantine or Eastern Roman Emperors made enormous fortunes from this trade, and the city flourished like few cities before it. Palaces, Churches and enormous public buildings were built. The Rape of Constantinople by the Christians in the Fourth Crusade was the end of the fortunes of the city. Although it continued on til the mid-15th Century, its wealth was finished. The fabulous wealth of the Jewel of Christendom passed into history.
artifacts tell archaeologists that trade was important to us.Artifacts came from the north south east and west
spices, foodstuffs, silk, and timber
Because it had a central location overlooking the Bosporus and Dardanelles. In order to trade between the Mediterranean Sea and black sea you had to go through Constantinople. It became the wealthiest part of the Roman Empire and controlled most trade between the east and west.
Constantinople was approximately 800 miles east from Rome.