Catholic Persecution of 1801
Queen Jeongsun banned Catholicism and had Yi Seung-hun and about a hundred believers executed; Jeong Yak-yong and his brother were exiled.

Ethan Doyle White · CC BY-SA 4.0 · Source
Ruling as regent for the young King Sunjo, Queen Jeongsun banned Catholicism as a heresy. Yi Seung-hun, Jeong Yak-jong and the Chinese priest Zhou Wenmo were executed, and Jeong Yak-yong and Jeong Yak-jeon were exiled to Gangjin and Heuksando, a heavy blow to the Southerner faction.
The persecution intensified when the believer Hwang Sa-yeong was caught trying to send a silk letter to the bishop in Beijing asking for Western troops to secure religious freedom.


