Cairo.
No, they are both separate countries. Egypt is in Africa, and Turkey is in two continents, Asia and Europe.
There is no capital city that touches two continents. There are four cities in the world that touch two continents, but none of them is the capital of a country.
Europe and Asia are two continents that are north of Egypt. Europe borders Egypt to the north across the Mediterranean Sea, while Asia is separated from Egypt by the Sinai Peninsula.
Egypt is mostly in Africa and has a small part in Asia.
Africa and Asia.
Europe and Asia are the two continents that are touching Africa. The region where these three continents meet is known as the Sinai Peninsula in Egypt.
Before Menes married the princess of Lower Egypt, the capital of upper Egypt was Heirrakonpolh, and for lower Egypt was Heliopolis. After he unified the two kingdoms, the capital of Egypt became Memphis.
Istanbul is not a capital city. The capital of Turkey is Ankara. Constantinople (now known as Istanbul) was the capital city of The Byzantine Empire
Egypt only straddles two continents: Africa and Asia. Historically, the Khedivite Rulers of Egypt controlled several Greek Islands in the mid-1800s, but this was the last time that Egypt had any European territory.
Most of Egypt is in Africa, but Egypt also controls the Sinai peninsula, which is considered to be part of Asia.
Asia and Europe share Istanbul, the capital of Turkey.