How did an ancient African civilization carve, transport, and raise granite monuments weighing more than 150 tons, without cranes, engines, or modern technology?
The Obelisks of a x u m are among the greatest engineering mysteries of the ancient world. Built nearly 2,0 0 0 years ago by the powerful Kingdom of A xum in Ethiopia, these towering monuments were carved from single pieces of granite and erected with astonishing precision.