"There is one group for whom female roles were absolutely central: the Guglielmites. These were followers of a holy woman, Guglielma, who died in northern Italy in about 1281. She was believed to be (and possibly in reality actually was) the daughter of the king of Bohemia, thus a relative to several other very famous holy women (Elizabeth of Hungary, Agnes of Bohemia, and Margaret of Hungary). Following her death, it appears that those close to her—particularly a woman called Maifreda da Pirovano and a man called Andreas Saramita—came to believe that Guglielma had been the incarnation of the Holy Spirit, sent to the world in order to establish a new Church led by a female pope, and that following her death Guglielma would have a Second Coming, which would lead to the conversion of all non-Christians.
Here, alone of all the medieval heresies, an idea about specifically female spirituality stands center stage. The cult of Guglielma was in some respects much like other cults directed toward a local saint; Guglielma’s body was buried in the local monastery, for example. But Maifreda appears to have played a particularly central, and possibly quasi-sacerdotal, role in its devotions: distributing consecrated hosts, bestowing blessings, and having various people (including local lords and ladies) genuflect before her and kiss her hand.
Lady Sibilla Malconzato, very much involved in the sect, eventually reported to inquisitors that:
at Easter last past, Sister Maifreda da Pirovano made herself in the manner of a priest, and Sister Fiordebellina and Sister Agnesina and Andreas Saramita and Franceschino Malconzato had vestments, and Albertone da Novate and Felicino Carentano and Ottorino da Garbagnate had white mantles, and they prepared a table in the manner of an altar, and they had a chalice and other necessary things for saying mass; and the said Sister Maifreda said mass and held the Host and raised it up, and did all things around that mass in the manner done by other priests; and the said Andreas spoke the Gospel and the said Albertone spoke the Epistles.
This is perhaps the most direct account of a woman acting as a priest to be found anywhere in the medieval sources; it is interesting to note that even while Maifreda prepared the Eucharist, it was her male assistants who preached. The sect was, however, very small and secretive, and did not attract much wider participation (though it may have held some continuing attraction to the Visconti dukes of Milan, as part of their antipapal strategy)."
Arnold John H., "Heresy and Gender in the Middle Ages", in: Bennett Judith, Karras Ruth (eds.), The Oxford Handbook of Women and Gender in Medieval Europe

















