rebuilt the city on the model of Paris, establishing the New Town (Nové Město). In 1348, he founded the Charles University in Prague, which was later named after him and was the first university in Central Europe. This served as a training ground for bureaucrats and lawyers. Soon Prague emerged as the intellectual and cultural center of Central Europe. Having made good use of the difficulties of his opponents, Charles was again elected in Frankfurt on 17 June 1349 and re-crowned at Aachen on 25 July 1349. He was soon the undisputed ruler of the Empire. Gifts or promises had won the support of the Rhenish and Swabian towns; a marriage alliance secured the friendship of the Habsburgs; and an alliance with Rudolf II of Bavaria, Count Palatine of the Rhine, was obtained when Charles, who had become a widower in 1348, married Rudolph's daughter Anna. In 1350, the king was visited at Prague by the Roman tribune Cola di Rienzo, who urged him to go to Italy, where the poet Petrarch and the citizens of Florence also implored his presence. Turning a deaf ear to these entreaties, Charles kept Cola in prison for a year, and then handed him as a prisoner to Clement at Avignon. Outside Prague, Charles attempted to expand the Bohemian crown lands, using his imperial authority to acquire fiefs in Silesia, the Upper Palatinate, and Franconia. The latter regions comprised "New Bohemia", a string of possessions intended to link Bohemia with the Luxemburg territories in the Rhineland. The Bohemian estates, however, were not willing to support Charles in these ventures. When Charles sought to codify Bohemian law in the Maiestas Carolina of 1355, he met with sharp resistance. After that point, Charles found it expedient to scale back his efforts at centralization. Holy Roman Emperor In 1354, Charles crossed the Alps without an army, received the Lombard crown in St. Ambrose Basilica, Milan, on 6 January 1355, and was crowned emperor at Rome by a cardinal on April 5th of the same year. His sole object appears to have been to obtain the Imperial crown in peace, in accordance with a promise previously made to Pope Clement. He only remained in the city for a few hours, in spite of the expressed wishes of the Roman people. Having virtually abandoned all the Imperial rights in Italy, the emperor re-crossed the Alps, pursued by the scornful