Henry I of Portugal

Henry was king of Portugal and a cardinal of the Catholic Church. He ruled Portugal between 1578 and 1580 and was known as Henry the Chaste and the Cardinal-King. As a clergyman, he was bound to chastity, and as such, had no children to succeed him, and thus put an end to the House of Aviz. His death led to the Portuguese succession crisis of 1580 and ultimately to the 60-year Iberian Union that saw Portugal share a monarch with that of Spain. The next independent monarch of Portugal would be John IV, who took the throne after 60 years of Spanish rule.