1. Cairo, Egypt: Cairo is the largest city in the Middle East and the capital of Egypt. It has a population of over 20 million people and is a major center for trade, commerce, and tourism.
2. Tehran, Iran: Tehran is the capital and largest city of Iran. It has a population of over 8.5 million people and is known for its cultural and historical landmarks.
3. Baghdad, Iraq: Baghdad is the capital of Iraq and has a population of approximately 7 million people. It is an ancient city with a rich history and is the center of the country's political and economic activities.
4. Istanbul, Turkey: Istanbul is the largest city in Turkey and is also considered a transcontinental city as it is located on the Bosphorus Strait, which separates Europe and Asia. Istanbul has a population of over 15 million people and is a major cultural and economic center.
5. Riyadh, Saudi Arabia: Riyadh is the capital and largest city of Saudi Arabia. It has a population of over 7.5 million people and serves as the economic, political, and administrative center of the country.
6. Amman, Jordan: Amman is the capital of Jordan and is located at the foothills of the Jordanian Highlands. It has a population of over 4 million people and is a hub for trade, business, and tourism.