Affonso then turned his attention to his own position in Portugal, and determined to bridle the power of the bishops in spite of his oath at Paris. Perceiving that this could only be done with the assistance of the great body of his people, he summoned a great Cortes at Leiria in 1254, to which representatives of the cities of the kingdom were elected to sit with the nobles and higher clergy. This Cortes is of the greatest importance in the constitutional history of Portugal, and its composition shows that Affonso III. understood, like Simon de Montfort and Edward I. in England, that it was only by an alliance with the people that he could check the power of feudalism and sacerdotalism. His policy was rewarded; the bishops recognized the need for submission; and with the consent of the Cortes, Affonso dared the interdict laid on the kingdom for his second marriage, and forced the clergy to continue their functions. Abroad he maintained peace through his alliance with Alfonso the Wise, and finally, on the petition of the now submissive prelates of Portugal, Pope Urban IV. legalized the king’s second marriage and legitimated his son Diniz in 1262. He was everywhere honoured and successful, and in 1263 Alfonso X. made over the full sovereignty of the Algarves to him, when he assumed the title of King of Portugal and the Algarves. [Illustration: FAÇADE OF LISBON CATHEDRAL. (_After a Photograph._) _The oldest church in the city, as expressed by the proverb, “Velho Como a Sé”._] The people now began to make their power felt in the Cortes, and Affonso soon had to pay for the assistance which they had previously rendered to him. In a full Cortes held at Coimbra in 1261, the representatives of the cities boldly denounced the king’s habit of tampering with the coinage, and compelled his recognition of the principle that taxes were not levied by the inherent right of the king, but by the free consent of the people. As a popular king, he completely mastered the bishops, in spite of their ability and learning, and he was much aided in this work by the orders and regulations specially issued by Pedro Hispano, the great Portuguese scholar and theologian, who had been the king’s friend when Archbishop of Braga, and who became a cardinal, and afterwards for a short time pope, as Pope John XXI. After a prosperous and successful reign, Nemesis came upon Affonso III. for his behaviour to his brother, in the rebellion of his son Diniz in 1277, who remained in arms until 1279, when the king died in a state of despair, and of misery at his son’s ingratitude.