How did ancient trade routes shape the development of major world cities?

Throughout history, ancient trade routes such as the Silk Road and the Trans-Saharan network facilitated the exchange of goods, ideas, and culture across continents. This exchange played a pivotal role in the growth and development of several major world cities. For instance, cities like Venice, Istanbul, and Timbuktu became bustling hubs of commerce and cultural melting pots due to their strategic locations along these routes. Understanding the historical impact of trade routes can provide insights into how geography influenced the economic and cultural prosperity of cities, subsequently affecting global socio-economic structures. How did these trade routes contribute to the urban landscapes and societal frameworks we observe in these cities today?