The Spirituals publicly declared the leaders of the Franciscans as heretics, along with Popes Gregory IX, Nicholas III, and Innocent III. Innocent had spoken against the teachings of Joachim of Fiore, a brilliant theologian whose ideas supported the Spirituals. Another pope, Benedict XI, forbade Ubertino from preaching and banished him to Monte Alverna, a remote convent in the center of the Tuscan Apennines that was associated with St. Francis (he supposedly received the stigmata there).
Rather than be penitent and alter his views, Ubertino used his time to write a book, Arbor Vitae Crucifixae Jesu Christi ("The Tree of the Crucified Life of Jesus"), in which he promoted his views on the poverty of Christ and Christians. The book became popular reading, which brought it to the attention of the church authorities.
In the book, Ubertino had identified Pope Boniface VIII and Benedict XI as the first and second beats of the Apocalypse. This was not received well by the papacy, and Ubertino was summoned to Avignon with other leaders of the Spirituals to debate his ideas. Ubertino's demand that the Spirituals of the Franciscans have separate monasteries was denied. Pope Clement V issued a bull in 1312, Exivi de Paradiso, in which he declared the Franciscans able to accept and use money for necessities despite the strict rule of St. Francis.
In 1317, Ubertino was allowed to lave the Franciscans and make his home with the Benedictines, but he did not stop commenting loudly on the Franciscans, for which he was excommunicated in 1318. In 1322, the Dominicans and the Franciscans were arguing about the poverty of Jesus Christ, and Ubertino was summoned once again to Avignon to offer his opinions. Ubertino's opinion mirrored the papal bull of 1312: although Christ and the Apostles rejected personal possessions, they used alms and goods for necessities and to help others.
Pope John XXII liked this answer. Ubertino stayed in Avignon, but in 1325 he was accused of heresy again by speaking out in support of Peter Olivi, a French Franciscan who had been Ubertino's teacher in Florence who also promoted strict poverty and probably influenced Ubertino in that direction. Pope John XXII ordered him arrested, but Ubertino fled and disappeared from the historical record.
I mentioned Joachim de Fiore above. His ideas still resonate today among theologians. Our current Pope quoted him just a few months ago, so I think he's worth discussing. See you next time.