During the same period that the Roman Empire rose and fell, the influential Kingdom of Aksum held sway over parts of what are now Eritrea and northern Ethiopia. Surprisingly little is known about Aksum’s origins, but by the 2nd and 3rd centuries A.D. it was a trading juggernaut whose gold and ivory made it a vital link between ancient Europe and the Far East. The kingdom had a written script known as Ge’ez—one of the first to emerge in Africa—and it developed a distinctive architectural style that involved the building of massive stone obelisks, some of which stood over 100 feet tall.