Final answer:
Alexandria, Virginia is the modern American city named after the ancient Egyptian city of Alexandria, founded by Alexander the Great.
Step-by-step explanation:
The modern American city named after a powerful city in ancient Egypt is Alexandria, Virginia. Alexandria in Egypt was founded by Alexander the Great in 331 BCE and became a prominent cultural and educational center, notably housing the renowned Library of Alexandria. Inspired by the grandeur of ancient civilizations, American places often inherited names from notable cities of the classical world to reflect cultural, political, or educational ideals.
It was the largest Hellenistic city and had a population of around one million. The American city of Alexandria was named after the ancient Egyptian city to pay homage to its grandeur and historical significance.