It saw the minting of coins under its greatest king, Ezana, whose alliance with Byzantium started the kingdom's conversion to Christianity.
In the 6th century, this kingdom reduced the Yemen to vassals, while three centuries earlier it invaded and conquered the neighboring Meroe kingdom. Renowned for its huge obelisk tombs, it used its port at Adulis to dominate trade on the Red Sea. It saw the minting of coins under its greatest king, Ezana, whose alliance with Byzantium started the kingdom's conversion to Christianity. For 10 points - what was this trading kingdom of northeastern Africa that eventually developed into Ethiopia?
In the 6th century, this kingdom reduced the Yemen to vassals, while three centuries earlier it invaded and conquered the neighboring Meroe kingdom.
Axum (prompt on Ethiopia)