The actual beginnings of the Knights Templar (or to give their full title, “the Poor Fellow-Soldiers of Christ and of the Temple of Solomon”) go back another ten years, to a French crusader and knight named Hugh de Payens. De Payens recruited eight other knights (all his relatives by marriage or blood). They took upon themselves the task of guarding all pilgrims in the Holy Land. (Yes. Nine of them. And their horses. To cover all of Outremer.)
In 1129, at the Council of Troyes, the Knights were officially recognised by the Catholic Church, largely thanks to the efforts and influence of Bernard of Clairvaux (later St Bernard), who was a hugely influential figure in the Church (and also the nephew of one of the nine original members). The meteoric rise of the Knights Templar began here, with Bernard promoting their Rule as the noble ideal to aspire to. Their ranks and coffers swelled, and then, so did the rumours. Less than two centuries after their founding, the Knights Templar would be denounced as heretics and disbanded.