Eva Margaretha von Buttlar (22 June 1670, Barchfeld, Hesse-Kassel - 27 April 1721) was a mystic-libertine sectarian and the eponym for a group known as Buttlarsche Rotte (Buttlarian gang).
After the pietistscommand (assembly ban for separatist societies) of Karl von Hessen-Kassel, they moved from Allendorf to Glashütte and, later to Saßmannshausen near Lassphe in the shire of Wittgenstein.
On 3 November 1705, Winter announced Eva as the fiancé of the holy spirit and Appenfeller to be God's son.
the "practical application" of the mystical idea of the marriage of spiritual man with heavenly Sophia, as developed by Jakob Böhme and Johann Georg Gichtel involved the physical union with "Mother Eve" at the "Pool of Bethesda", which restored the androgynous "creation condition".
The "carnal intercourse as something sacred" (Winter considered), bound the members of the society in the practice of their faith.