How to get a Templar Knight's Guild?

[napoleon526]

I've gotten the Templars only once or twice, but i'm wondering if there's a time limit on when you can get them, since i've only been offered them early in the game. It would make sense if the game only allowed them in the early game, since the real Templars were wiped out in 1307, while the Knights of St. John existed on Malta until 1798, and I think they still exist in some form today.