Pope Pius IV (31 March 1499 – 9 December 1565), born Giovanni Angelo Medici, was head of the Catholic Church and ruler of the Papal States from 25 December 1559 to his death in 1565. Born in Milan , his family considered itself a branch of the House of Medici and used the same coat of arms .
Pope Paul IV, C.R. (Latin: Paulus IV; 28 June 1476 – 18 August 1559), born Gian Pietro Carafa, was head of the Catholic Church and ruler of the Papal States from 23 May 1555 to his death in 1559. While serving as papal nuncio in Spain, he developed an anti-Spanish outlook that later coloured his papacy.