In 330 AD, Constantine, then the emperor of the Roman Empire, moved the seat of power to Constantinople. Then, Constantine founded a "second Rome" (the Byzantine Empire). The city was strategically placed on the trade routes between Europe and Asia, and the Mediterranean Sea and the Black Sea, making it ideal for trade and travel.
Never seen that before, looks like it’s from a movie sorry:(
European cities began to grow around tbe year 1000 because of the fact that northern Europeans lived on rich, fertile plains, that they could farm a variety of crops. Turn around and sell to make a profit.