Answer:
Byzantium
Explanation:
Byzantine became an important city and centre of trade near the Black Sea. It was an ancient Greek city that became Constantinople after the Roman emperor Constantine I when he decided to relocate the capital of the Roman Empire from Rome to Greek colony Byzantium and it is now known as Istanbul. The Byzantine became rich and flourished because of its location because of the centre of a trade route.
Answer:
The necessary and proper clause. - Apex
