List of encyclicals of Pope John XXIII

[4][5] John XXIII's first encyclical, Ad Petri Cathedram, was issued eight months into his pontificate and was neither an important social document nor doctrinal exposition.

[3] The second, Sacerdotii nostri primordia, commemorated the one hundredth anniversary of the death of John Vianney, while Grata recordatio considered the use of the Rosary.

Princeps pastorum, his fourth encyclical, used 1 Peter 5:4 as its biblical text and celebrated Catholic missions.

Mater et magistra, the fifth encyclical, carried forward ideas from Leo XIII's Rerum novarum (1891), which had been issued 70 years earlier, as well as from Pius XI's Quadragesimo anno (1931).

[7] The sixth encyclical, Aeterna Dei sapientia, commemorated the death of Pope Leo I and called for unity within Christendom from external movements such as communism and secularism.