Complex sentence: The city of Alexandria, in the center of the coastline, as chosen by Alexander the Great, has been the hub of sea travel between the Mediterranean Sea and the Nile delta for over 2300 years.
Split into simpler sentences: The city of Alexandria, lies at the center of the Mediterranean Egyptian coastline, as chosen by Alexander the Great. It has been the been the hub of sea travel between the Mediterranean Sea and the Nile delta for over 2300 years.