Pope Callixtus — the three popes named Callixtus

The three popes called Callixtus

• Callixtus I (reigned c. 217–222): An early bishop of Rome traditionally remembered for pastoral policies and for a controversy with other Christian leaders of his day. He is associated with the Catacomb of Callixtus and is often described in later sources as a martyr.
• Callixtus II (pope 1119–1124): A 12th‑century pope who negotiated an important settlement in the long conflict between the papacy and the Holy Roman Emperor, culminating in the Concordat of Worms (1122), which clarified investiture rights and church reform issues.
• Callixtus III (pope 1455–1458): A Renaissance pope from the Borgia family who focused on organizing relief against the Ottoman advance after 1453, supported the retrial and partial rehabilitation of Joan of Arc, and promoted relatives to positions of influence.

These three figures illustrate how the same papal name can appear in very different contexts: theological controversy and martyrdom narratives in the 3rd century; legal and institutional settlement in the 12th century; and geopolitical and dynastic concerns in the 15th century.

Significance and distinguishing facts

Callixtus I is often linked to the catacombs that bear his name and to early disputes about penance and church discipline. Callixtus II is widely credited with helping to end the Investiture Controversy through negotiation rather than prolonged warfare. Callixtus III is remembered for his reaction to the fall of Constantinople and for promoting family members—most notably his nephew Rodrigo Borgia—who later became prominent in church affairs.

For further reading on the papal name and its occurrences across history see sources discussing the use of three popes with the same regnal name and the historical contexts that shaped each pontificate.