However, tensions between the Farnese and other Italian nobility were not limited to local events in Parma. Historian Leopold von Ranke gives an account of a 1639 visit to Rome by Odoardo Farnese, Duke of Parma and Piacenza. The Duke arrived in Rome to great fanfare - he was given gifts and escorted around the city by Pope Urban's Cardinal-nephews, Antonio Barberini and Francesco Barberini. But the Duke refused to pay due deference to the Pope's other nephew; the newly appointed Prefect of Rome, Taddeo Barberini. As the Duke prepared to leave, he suggested that an escort from the city (ordinarily reserved for the Grand Duke of Tuscany) would be appropriate. Francesco Barberini refused. The Duke took his leave but urged the Pope to chastise both Cardinal-nephews.