Tresel - Guillaume de Challant

Guillaume de Challant held the see of Lausanne from 1406 until his death in 1431, though this issue is attributed to the earlier portion of his episcopate. The Bishopric of Lausanne exercised temporal coinage rights under the Holy Roman Empire, a privilege that by the early fifteenth century was increasingly contested by Savoy, whose territorial ambitions around Lac Léman would eventually absorb the region entirely. The tresel — a small silver denomination peculiar to the Romand monetary system — circulated alongside Savoyard issues and was frequently subject to debasement edicts from competing authorities.