Louis IX., or St. Louis, as he is commonly called, was the eldest son of Louis VIII. and a grandson of Philip Augustus. He was born in 1214 and upon the death of his father in 1226 he succeeded to the throne of France while yet but a boy of twelve. The recent reign of Philip Augustus (1180-1223) had been a period marked by a great increase in the royal power and by a corresponding lessening of the independent authority of the feudal magnates. The accession of a boy-king was therefore hailed by the discontented nobles as an opportunity to recover something at least of their lost privileges. It would doubtless have been such but for the vigilance, ability, and masculine aggressiveness of the young king's mother, Blanche of Castile. Aided by the clergy and the loyal party among the nobles, she, in the capacity of regent, successfully defended her son's interests against a succession of plots and uprisings, with the result that when Louis gradually assumed control of affairs in his own name, about 1236, the realm was in good order and the dangers which once had been so threatening had all but disappeared. The king's education and moral training had been well attended to, and he arrived at manhood with an equipment quite unusual among princes of his day. His reign extended to 1270 and became in some respects the most notable in all French history. In fact, whether viewed from the standpoint of his personal character or his practical achievements, St. Louis is generally admitted to have been one of the most remarkable sovereigns of mediaeval Europe. He was famous throughout Christendom for his piety, justice, wisdom, and ability, being recognized as at once a devoted monk, a brave knight, and a capable king. In him were blended two qualities--vigorous activity and proneness to austere meditation--rarely combined in such measure in one person. His character may be summed up by saying that he had all the virtues of his age and few of its vices. No less cynical a critic than Voltaire has declared that he went as far in goodness as it is possible for a man to go.