John was a native of Vercelli and qualified at Paris as a doctor both of civil and canon law. While he was carrying out this office at Vercelli, encouraged by the Master General Jordan, he entered the Order of Preachers. Later he founded a convent there, which he also governed as prior. Afterwards, while most religiously ruling the Province of Lombardy, he was in the year 1264 elected as sixth Master General of the Order. Austere with himself, gentle towards others, he quickly visited nearly all the Order’s convents in Europe, and for almost twenty years labored fruitfully and attentively for the good of the whole Order. Furthermore, he made out an agenda for the Second Council of Lyons and at the request of Pope Gregory X zealously propagated the practice of showing reverence to the name of Jesus. John strenuously upheld the reputation and teaching of Thomas Aquinas. Averse to honors and unremitting in his work, he died peacefully at Montpellier. The devotion shown to him from time immemorial was confirmed by Pius X.
