could not hold the crowds, so he preached in the public squares—at Brescia in Italy, he preached to a crowd of 126,000. Reformer When he was not preaching, John was writing tracts against heresy of every kind. This facet of his life is covered in great detail by his early biographers, Nicholas of Fara, Christopher of Varese and Girlamo of Udine. While he was thus evangelizing, he was actively engaged in assisting Bernardine of Siena in the reform of the Franciscan Order, largely in the interests of a more rigorous discipline in the Franciscan communities. Like Bernardine, he strongly emphasized devotion to the Holy Name of Jesus, and, together with Bernardine, was accused of heresy on this account. In 1429, these Observant friars were called to Rome to answer charges of heresy, and John was chosen by his companions to speak for them. They were both acquitted by the Commission of Cardinals appointed to judge the accusations. He was frequently deployed to embassies by Popes Eugene IV and Nicholas V: in 1439, he was sent as legate to Milan and Burgundy, to oppose the claims of the Antipope Felix V; in 1446, he was on a mission to the King of France; in 1451 he went at the request of the emperor as Apostolic Nuncio to Austria. During the period of his nunciature, John visited all parts of the Empire. As legate, or inquisitor, he prosecuted the last Fraticelli of Ferrara, the Jesuati of Venice, the Crypto-Jews of Sicily, Moldavia and Poland, and, above all, the Hussites of Germany, Hungary and Bohemia; his aim in the last case was to make talks impossible between the representatives of Rome and the Bohemians, for every attempt at conciliation seemed to him to be conniving at heresy. He also worked for the reform of the Order of Friars Minor. He upheld, in his writings, speeches and sermons, theories of papal supremacy rather than the theological wranglings of councils (see Conciliar Movement). John, together with his teacher, Bernardine, his colleague, James of the Marche, and Albert Berdini of Sarteano, are considered the four great pillars of the Observant reform among the Friars Minor. Anti-Jewish incitement John was known as the "Scourge of the Jews". Like some other Franciscans, he ranged over a broad area on both sides of the Alps, and his preaching to mass open-air congregations often led to pogroms. In 1450 the