Answer:
Alexandria was an important city of the ancient world. For more than two thousand years, it was the largest city in Egypt and was its capital for almost half of that time. As an important trading post between Europe and Asia, it profited from the easy overland connection between the Mediterranean Sea and the Red Sea. It is most famous in antiquity as the site of the Pharos, the great lighthouse, considered one of the seven wonders of the ancient world, for the Temple of Serapis, the Serapion, which was part of the legendary library at Alexandria, as a seat of learning and, once, the largest and most prosperous city in the world. It was at one time the largest city in the ancient world before being eventually overtaken by Rome. The city was a major center of early Christianity and was the center of the Patriarchate of Alexandria, which was one of the major centers of Christianity in the Eastern Roman Empire.