Letter from Pope Marcellus II to every Catholic European king to inform them of the changes and the purpose of the Council of Trent. It also talks about the bad health of the pope and his desire to keep peace among the nations. He gives the king a blessing for his endurance in the Catholic faith. Dated 1555.

Letter from Pope Paul IV to Philip II to maintain his positions about the refusal of the abdication of Charles V, Philip's father. Also discusses that the papal authority has been discussed too much and obedience of Catholic States is needed. Dated 1555.

Letter from Pope Paul IV to Philip II regarding his intent to drive the Spaniards out of Naples. He tries to justify his will by stating that the Church has power over all kings. Dated 1557.

Letter from the security at the Vatican to the army of Philip II. The Church gives the names of people traveling Europe and preaching revolutionary ideas about freedom of religion. The nation of Spain is blessed because of its faith to the church. At the bottom of the document the secretary of Philip II put the King's symbols as a sign of approval. Dated 1563.