The philosophy of Voltaire, Helvetius, and Rousseau, was then in the ascendant--that empty sensualism which filled young heads with effervescing fancies. The university of Strasburg was under the direction of Koch, the celebrated lecturer upon international law; and, by a singular chance, another youth, whose name has since been well known, was also pursuing his studies at the same university; this was Benjamin Constant de Rebecque. Some degree of friendship sprung up between the students, and it is curious to observe what a different career was opened by the caprices of Fortune to the two pupils of Professor Koch. Count Metternich concluded his philosophical studies in the year 1790; the rest of his education was completed in Germany. When he reached the age of twenty he visited England and Holland, and afterwards went to live at Vienna, where he married Maria Eleonora, of Kaunitz-Rietberg. Metternich's first entry into the diplomatic corps was merely as a secretary at the Congress of Rahstadt,--a singular negotiation, which had a most tragical termination;[2] he afterwards accompanied Count Stadion in his missions to Prussia and to St. Petersburg, and was at the latter court at the time of the alliance between Russia and Austria, which fell to the ground in consequence of the rapidity of Napoleon's military investment of Ulm, and the revolt of Bavaria,--an admirable campaign, which at once placed the French emperor in the rank of the greatest military commanders. [2] The French commissioners were attacked on leaving the city and many killed.--_Editor._ Even at this early period it was the opinion of Metternich that the triple alliance between Russia, Prussia, and Germany, would not be too much to restrain the power of Napoleon; and a striking evidence of the importance of France and of her leader had just been afforded by the battle of Austerlitz. Count Metternich was called upon to take a part in all the treaties concluded at this time; and, up to this period, his opinions appeared to belong to the same school as those of Count Stadion, who was shortly afterwards appointed minister for foreign affairs. By him Metternich was proposed as ambassador to the court of Russia; but, the treaty of Presburg having completely altered the position of Austria in Europe, Francis II. preferred sending the young diplomatist to Napoleon; and, on the 15th of August, 1806, the day of the solemn national anniversary, the ambassador presented his credentials, and first appeared before the favourite of fortune and glory.