| Marie-Nicolas-Antoine Daveluy | |
| Birth Date: | 1818 3, df=yes |
| Feast Day: | 30 March 20 September (along with other Korean Martyrs) |
| Venerated In: | Roman Catholicism |
| Birth Place: | Amiens, France |
| Death Place: | Galmaemot, Korea |
| Titles: | Martyr |
| Beatified Date: | 6 October 1968 |
| Canonized Date: | 6 May 1984 |
| Canonized Place: | Seoul, South Korea |
| Canonized By: | Pope John Paul II |
| Major Shrine: | Galmaemot Martyrium, Boryeong, South Korea |
| Honorific Prefix: | Saint |
Marie-Nicolas-Antoine Daveluy (16 March 1818 - 30 March 1866) was a French missionary and saint. His feast day is March 30,[1] and he is also venerated along with the rest of the 103 Korean martyrs on September 20.
Antoine Daveluy was born 16 March 1818 in Amiens, France. His father was a factory owner, town councilman, and government official. The members of his family were devout Catholics and two of his brothers became priests. He entered the St. Sulpice Seminary in Issy-les-Moulineaux himself in October 1834 and was ordained a priest on 18 December 1841.
His first assignment was as an assistant priest in Roye. Despite poor health, he joined the Paris Foreign Missions Society on 4 October 1843. He departed for East Asia on 6 February 1844, intending to serve as a missionary in the Ryukyu Islands of Japan. He arrived in Macau, where he was persuaded by the newly appointed apostolic vicar of Korea, Jean-Joseph-Jean-Baptiste Ferréol, to accompany him there instead. The two were joined by Andrew Kim Tae-gŏn, a Korean seminarian who had been studying for the priesthood in Macau. They first traveled to Shanghai, where Bishop Ferréol ordained Father Kim on 17 August 1845. The three priests then made a stormy crossing by sea to Korea, arriving in Chungcheong Province in October.
Father Daveluy began work as a missionary in Korea, becoming fluent in the language. He wrote a Korean-French dictionary and other books about the Catholic Church and its history in Korean. On 13 November 1855, Pope Pius IX appointed him titular bishop of Akka and coadjutor to Bishop Siméon-François Berneux,[2] who had been appointed apostolic vicar in 1854[3] after the death of Bishop Ferréol in 1853.[4] He was consecrated by Bishop Berneux on 25 March 1857.[2]
After Bishop Berneux was executed during a campaign by the Korean government against Christians, Bishop Daveluy became apostolic vicar on 8 March 1866. He was promptly arrested on 11 March. Imprisoned and tortured, he staunchly defended his Catholic faith. Sentenced to death, he asked to be executed on Good Friday 30 March. He was beheaded at a Korean naval base in Galmaemot (갈매못) near present-day Boryeong along with two French priests, Pierre Aumaître and Martin-Luc Huin, and two lay catechists, Lucas Hwang Sŏk-tu (Bishop Daveluy's personal assistant) and Joseph Chang Chu-gi.
All five were canonized on 6 May 1984 along with Father Kim, Bishop Berneux and 96 other Korean martyrs.
The deaths of Berneux, Daveluy and other Catholic missionaries in Korea was followed by a French punitive expedition which reinforced the Korean policy of isolationism.
thumb|right|Reliquary of saint Anthony Daveluy in Amiens Cathedral.