Wiped out by the Order of Reason in 1670 AD (pg. 21 Technocracy: Syndicate).
von Reismann started them in 997 AD
They are strongest in France - Order of Reason pg. 101
DA Mage Grimoire appendix has info on them in 1230 AD. They left Hermetic House Ex Miscellanea in 1210. Attacked Mistridge Chantry same year.