Raised by this signal success to the summit of his power, lord paramount of Western Europe, only one thing remained to trouble the mind of the victorious emperor. His wife, Josephine, was childless; his throne threatened to be left without an heir. Much as he had seemed to love his wife, the companion of his early days, when he was an unknown and unconsidered subaltern, seeking humbly enough for military employment in Paris, yet ambition and the thirst for glory were always the ruling passions in his nature, and had now grown so dominant as to throw love and wifely devotion utterly into the shade. He resolved to set aside his wife and seek a new bride among the princesses of Europe, hoping in this way to leave an heir of his own blood as successor to his imperial throne. Negotiations were entered into with the courts of Europe to obtain a daughter of one of the proud royal houses as the spouse of the plebeian emperor of France. No maiden of less exalted rank than a princess of the imperial families of Russia or Austria was high enough to meet the ambitious aims of this proud lord of battles, and negotiations were entered into with both, ending in the selection of Maria Louisa, daughter of the Emperor Francis of Austria, who did not venture to refuse a demand for his daughter's hand from the master of half his dominions. [=The Divorce of Josephine and Marriages of Maria Louisa=] Napoleon was not long in finding a plea for setting aside the wife of his days of poverty and obscurity. A defect in the marriage was alleged, and the transparent farce went on. The divorce of Josephine has awakened the sympathy of a century. It was, indeed, a piteous example of state-craft, and there can be no doubt that Napoleon suffered in his heart while yielding to the dictates of his unbridled ambition. The marriage with Maria Louisa, on the 2d of April, 1810, was conducted with all possible pomp and display, no less than five queens carrying the train of the bride in the august ceremony. The purpose of the marriage did not fail; the next year a son was born to Napoleon. But this imperial youth, who was dignified with the title of King of Rome, was destined to an inglorious life, as an unconsidered tenant of the gilded halls of his imperial grandfather of Austria. CHAPTER IV. The Decline and Fall of Napoleon's Empire. [=The Causes of the Rise and Decline of Napoleon's Power=]