John of Vercelli (Giovanni da Vercelli) ( 1205 – 30 November 1283) was the sixth Master General of the Dominican Order (1264-1283).
Early life and education
John was born in 1205 to the Garbella family in Mosso Santa Maria in the Province of Biella, in the Piedmont region of Italy. He did his initial studies in Paris (one could not graduate in the Arts before the age of 21, and only after a minimum of six years of study), and then studied canon law in Paris, Pavia, and Vercelli before he joined the Dominican friars during the 1240s.

The Emperor Frederick II, that stupor mundi and "malleus Italiae Regionis", died on December 13, 1250. Pope Innocent IV's exile was over. He left Lyons on April 19, 1251, and arrived in his home town, Genoa, on May 18. From Genoa he began the difficult task of getting back the territories of the Catholic Church lost to the Emperor Frederick, and reconstructing the effective operation of the church hierarchy in northern and central Italy. One of his problems was the rise and flourishing of heresy in the Po Valley. On June 11, 1251, the pope issued instructions from Genoa to Vincentius of Milan and Joannes of Vercelli, to undertake the office of inquisitor, jointly or severally, in Venice and other parts of Lombardy. These were not the only inquisitors appointed. On the same day, and with the same form letter ("Misericors et Miserator"), the pope also appointed Peter of Verona and Vivianus of Bergamo to the same task in the area of Cremona and other cities of Lombardy. No doubt there were others, now unattested. The pope was also prepared to take on Frederick's sons Manfred and Enzo (Ezolino) of Sardinia, as he indicated in a letter to the Dominican Bishop of Treviso and the Prior of Mantua.

Umberto de Romans, the fifth Master General, elected in 1253, held the General Chapter in Buda, Hungary, on May 31, 1254. At the conclusion of the meeting, he appointed John of Vercelli as the Master General's Vicar to Hungary. Later (1255-1257) he was appointed Prior of the Dominican monastery in Bologna.

Prior of Lombardy
In 1257, at the Provincial Chapter for Lombardy held at Novara, he was elected Prior Provincial of Lombardy. At that time the province contained thirty convents of the Order. During his administration three new convents were founded, at Turin, Chieri and Tortona. He served as Prior of Lombardy for seven years. One of the major and continuing problems in his province was the rise and spread of heresy, especially Catharism. The inquisitorial machine was being constructed, as John's own service in Venice a few years earlier indicates. These new inquisitors were directing one question after another to Rome, and were overwhelming the Curia with their concerns. Alexander replied, urging them to act boldly and independently, against any manner or quality of person, but to continue to consult the Holy See in difficult cases. On March 23, 1262, the new pope, Urban IV, sent a mandate to John of Vercelli, authorizing him, in consultation with other discreet members of his Order, to appoint up to eight Dominican friars as inquisitors in the Province of Lombardy and the March of Genoa. He was also authorized to remove inquisitors from office who proved inadequate and to replace them; he could delegate this task to his vicar.
As Prior of Lombardy he was expected to see to the election of a delegate (diffinitor) to the annual General Chapter, and to preside over the Provincial Chapter in Lombardy. In 1258, the General Chapter was held at Toulouse, and the Provincial Chapter at Milan. He took part in the General Chapter at Valenciennes, on April 13, 1259, and held the Provincial Chapter in Bologna. In 1260 the General Chapter was in Strasbourg, and John presided over the provincial General Chapter, which was held at Ferrara. In 1261 the General Chapter was held at Barcelona, and the Provincial Chapter at Milan. In 1262, both meetings took place in Bologna. In 1263 the General Chapter was held in London, and the Provincial Chapter at Venice.
Master General
On June 7, 1264 he was elected as Master General by the General Chapter, held in Paris, under the presidency of Pierre of Tarentaise, the future Pope Innocent V. John held the post of Master General until his death. Known for his tireless energy and his commitment to simplicity, John made personal visits—typically on foot—to almost all the Dominican houses, urging his fellow friars to observe faithfully the Rule and Constitutions of the Order.





