Charles' imperial policy was focused on the dynastic sphere and abandoned the lofty ideal of the Empire as a universal monarchy of Christendom. In 1353, he granted the Duchy of Luxembourg to his half-brother, Wenceslaus. He concentrated his energies chiefly on the economic and intellectual development of Bohemia, where he founded the university in 1348 and encouraged the early humanists. He corresponded with Petrarch and invited him to visit the royal residence in Prague, whilst the Italian hoped – to no avail – to see Charles move his residence to Rome and reawaken tradition of the Roman Empire.