The Gate of Seville is a fortified gate on the western approach to Carmona in the Province of Seville, Spain. The structure originated as a tower in the 8th century BC and was expanded into a bastion by the Carthaginians to repel Roman attacks, giving it the quadrangular form still visible today. Under the Roman emperor Augustus, the Carthaginian fortification was reinforced and a temple was built on top of the bastion, the base of which is partly preserved. Julius Caesar, who was familiar with the town's defences, described Carmona as "the strongest city of Baetica during ancient times".