But Italy, so grand in cities, so varied in architectural wonders, so fertile in soil, so salubrious in climate, so rich in minerals, so prolific in fruits and vegetables and canals, was only a small part of the empire of the Caesars. The Punic wars, undertaken soon after the expulsion of Pyrrhus, resulted in the acquisition of Sicily, Sardinia, and Africa, from which the Romans were supplied with inexhaustible quantities of grain, and in the creation of a great naval power. Sicily, the largest island of the Mediterranean, was not inferior to Italy in any kind of produce. It was, it was supposed, the native country of wheat. Its honey, its saffron, its sheep, its horses, were all equally celebrated. The island, intersected by numerous streamy and beautiful valleys, was admirably adapted for the growth of the vine and olive. Its colonies, founded by Phoenicians and Greeks, cultivated all the arts of civilization. Long before the Roman conquest, its cities were famous for learning and art. Syracuse, a Corinthian colony, as old as Rome, had a fortress a mile in length and half a mile in breadth; a temple of Diana whose doors were celebrated throughout the Grecian world, and a theatre which could accommodate twenty-four thousand people. No city in Greece, except Athens, can produce structures which vie with those of which the remains are still visible at Agrigentum, Selinus, and Segesta. [Sidenote: Carthage.] Africa was one of the great provinces of the empire. It virtually embraced the Carthaginian empire, and was settled chiefly by the Phoenicians. Its capital, Carthage, so long the rival of Rome, was probably the greatest maritime mart of antiquity, next to Alexandria. Though it had been completely destroyed, yet it became under the emperors no inconsiderable city, and was the capital of a belt of territory extending one hundred and sixty miles, from the Pillars of Hercules to the bottom of the great Syrtis, unrivaled for fertility. Its population once numbered seven hundred thousand inhabitants, and ruled over three hundred dependent cities, and could boast of a navy carrying one hundred and fifty thousand men. [Sidenote: The richness of Greece.]