Louis Beaulieu was a French Catholic priest and missionary belonging to the Paris Foreign Missions Society. Born in Langon in 1840, he was ordained in May 1864 before traveling to Korea later that year to begin his religious work. His mission was conducted under extremely hazardous conditions, as the region where he served strictly forbade foreign preachers. After attempting to hide in the mountains to evade authorities, he was captured and executed by decapitation in March 1866.