They declared Pope Clement as an heretic .They composed   Christian prayers .None of the above choices .They explained the Christian dogma to Phillip IV .
What did the Templars dowhile they were in prison ?
She said " legends and inventions " about the knights had been perpetuated by " fantasies " such as Dan Brown 's The Da Vinci Code and - " though of a different literary calibre " - Umberto Eco 's Foucault 's Pendulum . She said that in 1312 Pope Clement had declared that the Templars were not heretics , and had explained that he had only dissolved the order to prevent Philip IV from " opening up a schism in the Church " . She said proof of the Templars ' fidelity to the Pope and Christian dogma lay in the prayer they had composed during their long imprisonment .