Around 316 AD, Frumentius and his brother Edesius from Tyre accompanied their uncle on a voyage to Ethiopia. When the vessel stopped at a Red Sea port, the natives killed all the travellers except the two brothers, who were taken to the court as slaves. They were given positions of trust by the monarch, and they converted members of the royal court to Christianity. Frumentius became the first bishop of Aksum. A coin dated to 324 shows that Ethiopia was the second country to officially adopt Christianity (after Armenia did so in 301), although the religion may have been at first confined to court circles; it was the first major power to do so.