 He had long held the See of Plasencia in Spain, where a noble bridge across the Tagus, built by him, is still known as "the cardinal's bridge".In spite of his age and feeble health, he was still willing to take a foremost part in the crusade that Pius II was preparing at Ancona in 1464, when the death of that pope (14/15 August) put an end to the enterprise.According to the rules of Pope Gregory X promulgated at the Second Council of Vienne, the Conclave should have taken place in the place where the Pope had died.