Axum Empire

The city of Aksum, which still exists today (its ancient remains), was inscribed on the UNESCO World Heritage List in 1980 for its historical value.

An excerpt from the article 20 facts about Axum Empire
The city was founded around the fifth century BC, was the capital of the first Ethiopian state, the Kingdom of Axum, the coronation site of the emperors of Ethiopia. It is a holy city of the Ethiopian Church.