First trial: Jetzer alone (1507–1508) The first trial took place in
Lausanne and Bern during the winter of 1507–1508, with Hans Jetzer as the sole defendant. At this stage, the authorities believed Jetzer to be the primary perpetrator of the fraud. The Bishop of Lausanne,
Aymon de Montfalcon, proceeded with considerable care, attempting to determine what
heresy Jetzer had committed. He remained firm in the face of calls from the City of Bern to have Jetzer tortured. However, the city leaders succeeded in bringing Jetzer back to Bern before year's end. In early February 1508, Jetzer was tortured several times. Under
torture, he made accusations against his superiors at the monastery, implicating the prior Johann Vatter, the subprior Franz Ueltschi, the lector Stephan Boltzhurst, and the steward Heinrich Steinegger in staging the apparitions.
Main trial: The four friars (1508) Unlike the lay brother Jetzer, the Dominican friars were full members of a religious order that was exempt from the authority of the bishop, so an extraordinary trial was required that needed papal approval. This main trial took place in Bern from 26 July to 7 September 1508, with Jetzer and the four monastery superiors as defendants. The judges were the Bishops of Lausanne and
Sion—Aymon de Montfalcon and
Matthäus Schiner—as well as Peter Sieber, Provincial of the Upper German Province of the Dominican Order. Provincial Sieber attempted for as long as possible to prevent his fellow friars from being tortured, but when torture was finally decided, he resigned from the court. The torture began with the steward Heinrich Steinegger and subprior Franz Ueltschi, then moved on following their confessions to the prior Johann Vatter and the lector Stephan Boltzhurst. Although confessions obtained under torture must be treated with suspicion, what emerged was a coherent story from the five accused men (including Jetzer), who had been imprisoned separately since February 1508. With Provincial Sieber having removed himself from the court, the defendants were also questioned about any complicity on the part of the Upper German Province. These interrogations revealed that the plan to engineer miracles supporting the doctrine of the Virgin Mary's original sin had indeed been conceived at the provincial chapter in Wimpfen in early May 1506. The city of Bern had been chosen because the Dominicans believed it powerful, but its people also foolish. The main trial, however, did not reach a definitive verdict because the two bishops could not agree on the appropriate sentence. Montfalcon argued for life imprisonment for the Dominicans, while Schiner demanded the death penalty. Schiner's position was supported by Bern's city leaders, who had been criticized by the Dominicans as credulous and sharply criticized in the prophecy for their unreliability in matters of mercenary service.
Retrial and execution (1509) The inconclusive end to the main trial necessitated obtaining permission from
Pope Julius II for a retrial, which was held in Bern in May 1509. An Italian bishop,
Achille de Grassi of
Città di Castello, was brought in as presiding judge alongside the Bishops of Lausanne and Sion. On 23 May 1509, the four Dominican friars were taken from the ecclesiastical court to a scaffold on Kreuzgasse, where they were stripped of their religious orders—
defrocked—and handed over to the secular justice system. The charges against them included
heresy,
sacrilege,
poisoning,
idolatry (relating to
Eucharistic fraud), and the practice of
black magic. Critically, Jetzer was found not to be connected with these crimes, suggesting the court ultimately concluded he had been manipulated by the friars rather than being a willing conspirator. Toward the end of May, the secular court—likely the Kleine Rat—confirmed the death sentence against the friars. On 31 May 1509, Johann Vatter, Franz Ueltschi, Stephan Boltzhurst, and Heinrich Steinegger were
burned alive at the Schwellenmatte in Bern. Jetzer, who had been
banned for life, managed to escape from prison on 25 July 1509. == Contemporary impact and Reformation ==