Another question from the frequent latin expressions in Umberto Eco's The Name of the Rose. Here a character is complaining about evil followers from Spiritus Libertatis. I saw that this could translate to "spirit of freedom", but didn't find any context for this. Does anyone know if this was a movement or group during the 14th century? The book is placed in a fictional monastery in Italy during this time.
Yes, the Spiritus Libertatis (Free Spirit in English) was a doctrine declared to be heretical by the Catholic Church.
If you happen to be interested, there is a 1943 text in Latin about this movement: De secta Spiritus Libertatis in Umbria saec. XIV. Disquisitio et documenta by Livario Oliger, available on request here.