Paul III's artistic and architectural commissions were numerous and varied. The Venetian artist Titian painted a portrait of the Pope in 1543, and in 1546 the well-known portrait of Paul III with his grandsons Cardinal Alessandro Farnese and Ottavio Farnese, Duke of Parma. Both are now in the Capodimonte Museum, Naples. The military fortifications in Rome and the Papal States were strengthened during his reign. He had Michelangelo relocate the ancient bronze of the Emperor Marcus Aurelius to the Capitoline Hill, where it became the centerpiece to the Piazza del Campidoglio.