 Eleanor acted cleverly; she reached Henry's assurance that he would not interfere in her son's conflict with King Philip II of France, and she would also prevent the marriage of Henry's younger brother Conrad with Berengaria of Castile to confine the Hohenstaufen claims to power.Henry entered into further negotiations with the Lombard League cities and with Pope Celestine III on his Imperial coronation, and ceded Tusculum to the Pope.At Easter Monday on 15 April 1191, in Rome, Henry and his consort Constance were crowned Emperor and Empress by Celestine.