But from the time he became pope he followed in the footsteps of his holy predecessor, and was thoroughly imbued with the consciousness of the great responsibility connected with his exalted position.
His election was greeted with joy by the Roman people, as well as by the foreign rulers.
Later, he taught jurisprudence at the same university, and had among his pupils the famous future cardinals, Alessandro Farnese, Cristoforo Madruzzi, Otto Truchsess von Waldburg, Reginald Pole, Carlo Borromeo, and Stanislaus Hosius.
In 1545 the same pope sent him to the Council of Trent as one of his jurists.
On his return to Rome he held various offices in the Roman Curia under Julius III (1550-1555), who also appointed him prolegate of the Campagna in 1555.
While in Spain he was appointed secretary of papal Briefs, and after the election of Pius V, 7 Jan., 1566, he returned to Rome to enter upon his new office.
After the death of Pius V on 1 May, 1572, Ugo Buoncompagni was elected pope on 13 May, 1572, chiefly through the influence of Cardinal Antoine Granvella , and took the name of Gregory XIII.
Born at Bologna, 7 Jan., 1502; died at Rome, 10 April, 1585.