A married Korean layman martyred at Seoul’s Small West Gate in 1839, one of over a hundred Korean Catholics who died for their faith that year.

Augustine Yu Chin-gil was a lay Catholic in Joseon Korea, born in 1791 into a family of government officials in the Jo-dong neighborhood of Seoul, and he himself held an official government post — one of only a handful of the 103 Korean Martyrs to do so. After studying Neo-Confucianism, Taoism, and Buddhism in search of philosophical truth, he encountered torn pages of a Catholic text and, through his friendship with the layman Paul Chong Hasang, learned Catholic prayers and teaching; he was baptized in Beijing in 1824. Though never ordained, Augustine worked energetically to spread the faith among scholars and other prominent Koreans, and together with Paul Chong Hasang he helped compose the Korean Catholic community’s 1826 letter appealing to Rome for priests, an appeal that contributed to Korea’s establishment as a separate Vicariate Apostolic in 1831. He was married and the father of Peter Yu Tae-chol, who at just thirteen would become the youngest of the 103 Korean Martyrs. When the Gihae persecution erupted in 1839, Augustine was arrested in July and, despite seven sessions of torture, refused to renounce his faith or name fellow believers. He was beheaded at the Small West Gate on September 22, 1839, at the age of forty-eight. He was canonized in 1984 among the 103 Martyrs of Korea.

Quick Facts

• Born: c. 1791 in Jo-dong, Seoul, Korea
• Died: September 22, 1839, beheaded at the Small West Gate, Seoul, at age 48
• Feast Day: September 20 (with the 103 Martyrs of Korea)
• Beatified: July 5, 1925, by Pope Pius XI
• Canonized: May 6, 1984, in Seoul, by Pope John Paul II
• Patron of: venerated with the 103 Korean Martyrs as patrons of the Church in Korea; no separate individual patronage

Who Was Saint Augustine Yu Chin-gil?

Augustine Yu Chin-gil was born in 1791 in Jo-dong, a district of Seoul, into a family of government officials, and he himself came to hold an official government post, one of only a small number among the 103 Korean Martyrs to do so. As a young man he studied Neo-Confucianism, Taoism, and Buddhism in search of philosophical truth, and it was through torn pages of a Catholic theological text, and later through his friendship with the layman Paul Chong Hasang, that he first learned Catholic prayers and teaching. He was baptized in Beijing in 1824, an experience he described as profoundly transformative. Though never ordained, Augustine became an energetic and effective evangelist, drawing many scholars and other prominent Koreans to the faith. Together with Paul Chong Hasang, he helped compose the Korean Catholic community’s 1826 letter appealing to Rome for resident priests, an appeal that contributed to the establishment of Korea as a separate Vicariate Apostolic in 1831. He was married and the father of Peter Yu Tae-chol, who at just thirteen would become the youngest of the 103 Korean Martyrs. When the persecution of 1839 broke out, Augustine was arrested in July and, despite seven sessions of torture, refused to renounce his faith or name fellow believers. On September 22, 1839, at forty-eight years of age, he was executed by beheading at the Small West Gate, the same site where many other Korean martyrs of that year also died.

Historical Setting

Augustine’s death fell within the Gihae persecution of 1839, one of several major waves of anti-Catholic violence that struck Korea across the nineteenth century. The Joseon court viewed Catholicism as socially subversive, since it rejected ancestor rites central to Confucian family order and answered to a religious authority, the pope, entirely outside Korean control. The 1839 persecution was intensified by factional rivalries at court and suspicion toward the small number of French missionary priests who had begun entering the country in secret during the 1830s. Three French missionaries, including Bishop Laurent Imbert, were executed that same year alongside dozens of Korean laypeople. Seoul’s public execution grounds, including the Small West Gate, became the site of numerous Catholic martyrdoms during this period, a fact reflected in how many of Korea’s 103 canonized martyrs share that same place of death.

Why the Church Venerates Saint Augustine Yu Chin-gil

The Church honors Augustine Yu Chin-gil both as a martyr of the Gihae persecution and as one of the small circle of lay leaders whose vision and initiative made the survival and growth of the Korean Church possible. Together with Paul Chong Hasang, he helped carry the Korean Catholic community’s plea for priests all the way to Rome, an act of lay initiative that helped bring about Korea’s establishment as a separate Vicariate Apostolic in 1831 and, in time, the arrival of resident bishops and missionaries. His willingness to endure repeated torture without naming other believers, and his death within the same wave of persecution that would later also claim his young son, reflect a Church built on sustained, costly lay commitment as much as on clerical structures. He is honored as a reminder that some of the most consequential work in the Korean Church’s founding was carried out by laypeople who held no ecclesiastical office at all.

Canonization and Feast Day

Augustine Yu Chin-gil was beatified on July 5, 1925, by Pope Pius XI, in a group beatification of Korean martyrs, and was canonized on May 6, 1984, when Pope John Paul II traveled to Seoul to canonize 103 Korean martyrs in a single ceremony, the first canonization Mass a pope had ever celebrated outside Rome. His feast day is observed on September 20 together with all 103 Korean Martyrs, led by Saints Andrew Kim Taegon and Paul Chong Hasang, rather than on his individual death date of September 22. This shared feast reflects the Church’s practice of honoring large groups of martyrs from a single persecution collectively.

What Catholics Can Learn Today

Augustine Yu Chin-gil’s story shows that lay initiative, not only clerical office, can shape the destiny of a whole local Church: it was his and Paul Chong Hasang’s persistence in appealing to Rome that helped bring resident bishops and priests to Korea at last. For modern readers, his life is a reminder that believers with no formal title can still take responsibility for the Church’s growth and survival, and that fidelity under pressure, he endured seven sessions of torture without naming others, can be just as consequential as any single dramatic act. His witness, and that of his young son Peter Yu Tae-chol, martyred in the same wave of persecution, is also a sober reminder of what discipleship sometimes costs entire families.

A Prayer to Saint Augustine Yu Chin-gil

Saint Augustine Yu Chin-gil, hidden and faithful even to death, you left behind no great writings, only your steadfast witness at the Small West Gate. Teach us that holiness does not require fame, only faithfulness. When our own faith feels small or unnoticed, remind us that God counts what the world does not record. Strengthen those who suffer for their beliefs in silence today, and pray for us, that we may be as ready as you were to hold nothing back from Christ. Amen.

Sources

• the Roman Martyrology
• Vatican.va, canonization homily of Pope John Paul II, May 6, 1984
• EWTN, profile of the 103 Martyrs of Korea
• the Catholic Bishops’ Conference of Korea, historical record of the Gihae persecution