Saint John I, Pope and Martyr
Saint John I, Pope and Martyr: Feast Day

Honoring Saint John I
On May 18, the Church commemorates Saint John I, Pope and Martyr, who served as the Bishop of Rome from 523 until his death in 526. His papacy was marked by significant efforts to heal divisions within the Church, notably ending the Acacian Schism by reconciling the Eastern and Western churches. This reconciliation was achieved by restoring peace between the papacy and the Byzantine emperor Justin I. Additionally, Pope John I ratified the Alexandrian computation of the date of Easter, a decision that was eventually accepted throughout the West. His commitment to unity and truth remains a beacon for Christians today.
Despite his frail health, Pope John I embarked on a diplomatic mission to Constantinople, sent by the Ostrogothic King Theodoric. The purpose was to negotiate better treatment for the Arians, a Christian sect that Theodoric adhered to. While in Constantinople, Pope John I successfully advocated for the Arians, urging that they be treated with respect and encouraged to return to the Catholic faith. However, upon his return to Ravenna, Theodoric, who was himself an Arian, suspected Pope John I of conspiring with the Eastern emperor and had him imprisoned. The harsh conditions of his imprisonment led to his death on May 18, 526. His steadfastness in faith and his martyrdom underscore the sacrifices made for the unity and purity of the Church.
The Life and Martyrdom of Saint John I
Saint John I was born in Tuscany, Italy, and served as a deacon in Rome before his election as pope. His papacy was characterized by efforts to heal the rift between the Eastern and Western churches, a mission that led him to Constantinople. There, he successfully negotiated with Emperor Justin I to end the Acacian Schism, a significant division that had lasted for decades. This achievement was a testament to his diplomatic skills and unwavering commitment to Church unity.
Upon returning to Ravenna, Pope John I faced the wrath of King Theodoric, the Ostrogothic ruler who was an Arian Christian. Theodoric, feeling threatened by the reconciliation between the Eastern and Western churches, had Pope John I imprisoned. The pope endured severe mistreatment and neglect in prison, leading to his death on May 18, 526. His martyrdom is a poignant reminder of the challenges faced by Church leaders in their pursuit of unity and truth.
He is honored as a martyr.
— BritannicaBlessed are those who are persecuted for righteousness' sake, for theirs is the kingdom of heaven.
Matthew 5:10Symbols & iconography
- Papal TiaraRepresents his role as Pope.
- Broken ChainsSymbolizes his imprisonment and martyrdom.
Customs & traditions
Attend Mass
Participate in the Eucharist to honor Saint John I's commitment to the Church.
Read His Biography
Share stories of his life and martyrdom to inspire faith and unity.
Pray for Church Unity
Offer prayers for the unity of all Christians, reflecting Saint John I's mission.
Prayers & readings
About this date
The feast day is celebrated on May 18, the anniversary of Saint John I's death in 526, honoring his martyrdom and dedication to the Church.
Frequently asked
Why is Saint John I considered a martyr?
He was imprisoned and died due to his steadfast faith and efforts to unify the Church.
What was the Acacian Schism?
A significant division between the Eastern and Western churches that lasted for decades.
How did Saint John I contribute to the Church's unity?
He reconciled the Eastern and Western churches and ratified the Alexandrian computation of Easter.
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