While Joseon persecuted Catholics, Europe was already separating church from state

Catholicism, which reached Joseon at the end of the 18th century, was met with sweeping state repression for nearly a hundred years afterward. Europe in those same years had already passed through its long age of religious war and was working out a new relationship between state and religion. The two regions faced the same problem — religion and power — in strikingly different ways.

Persecution after persecution, from 1801 to 1866

In 1801, just after King Sunjo came to the throne, the Noron Byeokpa faction branded their political opponents, the Southerner Sipa, as Catholics and suppressed them on a large scale. The Silhak scholar Jeong Yak-yong and his brothers were exiled, and the repression grew harsher still when a silk letter written by Hwang Sa-yeong, appealing for outside help for the Korean church, was discovered. Catholics continued to be persecuted intermittently for refusing ancestral rites, which was taken as a challenge to the Confucian order, and the persecutions peaked in 1866. That year French missionaries and thousands of Korean believers were executed, and France used the killings as a pretext to send a fleet against Ganghwa Island.

Joseon's persecution of Catholics was more than religious repression. It was a head-on collision between a state built on Neo-Confucian social ranks and ancestral veneration and an entirely foreign worldview. Catholic teaching on human equality and its refusal of ancestral rites were understood as striking at the foundations of a society ordered by the yangban elite.

Europe's different road, toward separating church and state

As it happens, Europe in the same years was moving in the opposite direction. The French Revolution of 1789 transferred the Catholic church's vast privileges and lands to the state, and Napoleon, who took the imperial title in 1804, wrote freedom of religion and secular rule of law into the Napoleonic Code. Tension between Catholic and Protestant, and between state and church, hardly disappeared in Europe either, but the broad current ran toward states gradually recognizing freedom of belief rather than imposing a particular faith.

At the same time the European powers were expanding into Asia behind missions and trade. The Opium War of 1840-1842, which forced open Qing China, is the clearest case. The French expedition against Ganghwa in 1866 was not unrelated to that same westward push into East Asia. Joseon's persecution of Catholics was, internally, a struggle to preserve the Neo-Confucian order — but externally it was also a defensive reaction to the pressure of Western expansion. While Joseon strained to bar its doors and control belief and thought, Europe had already arrived at those doors. After the French and American expeditions Joseon leaned into an even harder refusal to open relations, which only postponed a larger upheaval.

What the comparison tells us

Joseon's persecutions and Europe's separation of church and state look like opposite directions, but they were answers from different moments to the same question: how far may a state control religion and thought? Europe reached its answer only after long religious wars and a revolution. Seen that way, Joseon's persecutions can be read as one stage of the strain a Neo-Confucian order underwent in colliding with new ideas — a strain that entered a new phase after the opening of the ports in 1876, when Joseon confronted the modern world in earnest.

Joseon's control of religion did not last. After the Treaty of Ganghwa opened the ports in 1876 and commercial treaties with Western powers followed, freedom to preach came to be permitted in practice, and in the 20th century the constitution of the Republic of Korea wrote freedom of religion into fundamental rights. That a faith once punishable by death became a constitutionally guaranteed right within little more than a century shows how far the relationship between state and religion can shift from one age to the next.

Many of those martyred in the persecution of 1866 have since been canonized and are honored as saints by the Catholic church in Korea — a case of the memory of persecution being transformed, well over a century later, into the identity of a community of faith.

At a glance

Year	Korean history	World history
1789	—	The French Revolution
1801	The Sinyu persecution	—
1804	—	Napoleon crowned emperor; the Napoleonic Code
1840-1842	—	The Opium War
1866	The Byeongin persecution and the French expedition	—