From Wikipedia: The Knights Templar - Inquisition Trials

An historical example of the (alledged) use of torture to extract confessions.

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Here's a taste: 

Of the various trials held in France, the first, and one of the larger trials, ran from 19 October to 24 November 1307, and was held in Paris. A total of 138 prisoners gave a full testimony and almost all admitted guilt to one or more charges. Since torture was used to elicit these confessions, the reliability of their testimony before this and other inquisitional tribunals remains an open question. What is known is these earlier confessions contradicted later testimony before the 1310 papal commissions in Paris.[30] Another important trial that was held at Poitiers between 28 June and 2 July 1308 where at least 54 Templars testified before the pope and his commission of cardinals. Here too a considerable number of defendants confessed to one or more of the charges. When asked if their statements were freely given many said that, while they had been tortured or threatened, restricted to bread and water and other forms of harsh treatments had been imposed on them, their confessions were not the results of any torture. But in 1310 at least three said they had lied in front of the Pope and now wished to defend the order.