Such were Egypt, Syria, Asia Minor, Greece, and Africa, all of which had been great empires, but all of which were incorporated with the Roman in less than two hundred years after Italy succumbed to the fortunate city on the Tiber. But these old and venerated monarchies, with their dependent states and provinces, though imposing and majestic, did not compose the vital part of the empire of the Caesars. It was those new provinces which were rescued from the barbarians, chiefly Celts, where the life of the empire centred. It was Spain, Gaul, Britain, and Illyricum, countries which now compose the most powerful European monarchies, which the more truly show the strength of the Roman world. And these countries were added last, and were not fully incorporated with the empire until imperial power had culminated in the Antonines. From a comparative wilderness, Spain and Gaul especially became populous and flourishing states, dotted with cities, and instructed in all the departments of Roman art and science. From these provinces the armies were recruited, the schools were filled, and even the great generals and emperors were furnished. These provinces embraced nearly the whole of modern Europe. [Sidenote: Spain.] [Sidenote: Its provinces.] [Sidenote: Productions.] [Sidenote: Its towns and cities.] [Sidenote: Its commercial centres.] Spain had been added to the empire after the destruction of Carthage, but only after a bitter and protracted warfare. It was completed by the reduction of Numantia, a city of the Celtiberians in the valley of the Douro, and its siege is more famous than that of Carthage, having defied for a long time the whole power of the empire, as Tyre did Alexander, and Jerusalem the armies of Titus. It yielded to the genius of Scipio, the conqueror of Africa, as La Rochelle, in later times, fell before Richelieu, but not until famine had done its work. The civilization of Spain was rapid after the fall of Numantia, and in the time of the Antonines was one of the richest and most prized of the Roman provinces. It embraced the whole peninsula, from the Pillars of Hercules to the Pyrenees; and the warlike nations who composed it became completely Latinized. It was divided into three provinces--Boetica, Lusitania, and Tarraconensis--all governed by praetors, the last of whom had consular power, and resided in Carthago Nova, on the Mediterranean. Under Constantine, Spain, with its islands, was divided into seven provinces, and stood out from the rest of the empire like a round bastion tower from the walls of an old fortified town. This magnificent possession, extending four hundred and sixty miles from north to south, and five hundred and seventy from east to west, including, with the Balearic Isles, 171,300 square miles, with a rich and fertile soil and inexhaustible mineral resources, was worth more to the Romans than all the conquests of Pompey and Sulla, since it furnished men for the armies, and materials for a new civilization.