Athanasius recorded a letter which was sent to its king Ezana by Constantius II, while Procopius noted its struggle with a Yemeni ruler named Abreha.  
At one point, it was ruled by the brothers Abreha and Atsbeha, who were notably visited by Frumentius.  Athanasius recorded a letter which was sent to its king Ezana by Constantius II, while Procopius noted its struggle with a Yemeni ruler named Abreha.  Its King Bazen has been claimed to be one of the Three Magi, while its last great ruler was known as Kaleb.  Endubis was the first of its rulers to oversee the minting of coins, and Gedara is mentioned in its language, Ge'ez, as the "king of kings," a title inherited by all of its rulers, including one whose fourth-century invasion of Meroe made it the most powerful empire in Nubia.  FTP, name this empire, centered at a namesake capital on the Tigray Plateau, which flourished between 100 and 700 CE.
At one point, it was ruled by the brothers Abreha and Atsbeha, who were notably visited by Frumentius.  
Axum (or Aksum)