However, in June 1515, he rose in open rebellion, and in 1517 even fled to Fribourg in order to secretly promote a cooperation between the republican factions in both cities.
After a summary trial held on the same day, Berthelier was found guilty and was sentenced to death by beheading.
In the grounds of the church that stands beside the Domaine de Chateauvieux in the village of Peney, overlooking the Rhone near Geneva, there is a small plaque erected in 1986 to commemorate the 450th anniversary of the Reformation.
On the site now stands the Domaine de Chateauvieux, a luxury hotel and restaurant which has a brief historical account of the castle in English.
As a prominent Libertine Philibert Berthelier was secretary to the Council of the Two Hundred, and, known for his sexual promiscuity, was excommunicated by the consistory of the Church of Geneva in 1551.