Originally Posted by KSigMason
Sorry galexander, busy day, couldn't get on.
As far as I have read, Crowley did not found it, but is one of the most famous members. Originally, there may have been some associations only through some men being members in both, but once Crowley took charge, the OTO was reformed. And as far as I've seen, there are not too many Masons that are also members.
As far as I understand the Golden Dawn never recruited from within Freemasonry, and from what I've seen, recruiting for a non-Masonic organization is looked down on.
Although the O.T.O. had a history dating back before Crowley, he certainly shaped the later form of the O.T.O. so in that respect he could be considered as a founder member of the modern form of the O.T.O.
See the following link:
US Grand Lodge, OTO: History of Ordo Templi Orientis
In 1912 Crowley became the National Grand Master General of Great Britain and Ireland of the Order and was Outer Head of the Order from 1922 to his death in 1947.