Not to the rude North, but to this society, so pagan, so pleasure-loving, came the first missionaries of the new Christian faith, to meet in the arenas of Gaul the fate of their fellow-believers in Rome, to hide in subterranean caves and crypts, to endure, to persist, and finally to conquer. In the III and IV centuries many of the great Bishoprics were founded, Avignon, Narbonne, Lyons, Arles, and Saint-Paul-trois Châteaux among others; but these same years brought political changes which seemed to threaten both Church and State.
Roman power was waning. Tribes from across the Rhine were gathering, massing in northern Gaul, and its spirit was antagonistic to the contentment of the rich Mediterranean provinces. The tribes were brave, ruthless, and barbarous. Peace was galling to their uncontrollable restlessness. The Gallo-Romans were artistic, literary, idle, and luxurious. They fell, first to milder but heretical foes; then to the fierce but orthodox Frank; and the story of succeeding years was a chronicle of wars. Like a great swarm of locusts, the Saracens--conquerors from India to Spain--came upon the South. They took Narbonne, Nîmes, and even Carcassonne, the Invulnerable. They besieged Toulouse, and almost destroyed Bordeaux. Other cities, perhaps as great as these, were razed to the very earth and even their names are now forgotten. Europe was menaced; the South of France was all but destroyed.
Again the Frank descended; and like a great wind blowing clouds from a stormy sky, Charles Martel swept back the Arabs and saved Christianity. Before 740, he had returned a third time to the South, not as a deliverer, but for pure love of conquest; and by dismantling Nîmes, destroying the maritime cities of Maguelonne and Agde, and taking the powerful strongholds of Arles and Marseilles, he paved the way for his great descendant who nominally united "all France."
But Charlemagne's empire fell in pieces; and as Carlovingian had succeeded Merovingian, so in 987 Capetian displaced the weak descendants of the mighty head of the "Holy Roman Empire." The map changed with bewildering frequency; and in these changes, the nobles--more stable than their kings--grew to be the real lords of their several domains. History speaks of France from Clovis to the Revolution as a kingdom; but even later than the First Crusade the kingdom lay somewhere between Paris and Lyons; the Royal Domain, not France as we know it now. The Duchy of Aquitaine, the Duchy of Brittany, Burgundy, the Counties of Toulouse, Provence, Champagne, Normandy, and many smaller possessions, were as proudly separate in spirit as Norway and Sweden, and often as politically distinct as they from Denmark.