A Witches' Sabbath is a purported gathering of those believed to practice witchcraft and other rituals. The phrase became popular in the 20th century. Emergence as a Popular Phrase in the 20th century Prior to the late 19th century, it is difficult to locate any English use of the term sabbath to denote a supposed gathering of witches. The phrase is used by Henry Charles Lea in his History of the Inquisition of the Middle Ages (1888). Writing in 1900, German historian Joseph Hansen who was a correspondent and a German translator of Lea's work, frequently uses the shorthand phrase hexensabbat to interpret medieval trial records, though any consistently recurring term is noticeably rare in the copious Latin sources Hansen also provides (see more on various Latin synonyms, below). Notably, the most infamous and influential work of witch-phobia, Malleus Maleficarum (1486) does not contain the word sabbath (sabbatum). Lea and Hansen's influence may have led to a much broader use of the shorthand phrase, including in English. Prior to Hansen, use of the term by German historians also seems to have been relatively rare. A compilation of German folklore by Jakob Grimm in the 1800s (Kinder und HausMärchen, Deutsche Mythologie) seems to contain no mention of hexensabbat or any other form of the term sabbat relative to fairies or magical acts. The contemporary of Grimm and early historian of witchcraft, WG Soldan also doesn't seem to use the term in his history (1843). A French connection In contrast to German and English counterparts, French writers (including Francophone authors writing in Latin) used the term more frequently, albeit still relatively rare. There would seem to possibly be deep roots to inquisitorial persecution of the Waldensians. In 1124, the term inzabbatos is used to describe the Waldensians in Northern Spain. In 1438 and 1460, seemingly related terms synagogam and synagogue of Sathan are used to describe Waldensians by inquisitors in France. These terms could be a reference to Revelation 2:9. ("I know the blasphemy of them which say they are Jews and are not, but are the synagogue of Satan.") Writing in Latin in 1458, Francophone author Nicolas Jacquier applies synagogam fasciniorum to what he considers a gathering of witches. About 150 years later, near the peak of the witch-phobia and the persecutions which led to the execution of an estimated 40,000-100,000 persons, with roughly 80% being women, the Francophone writers still