Choe Je-u, who used the pen name
Su-un, (18 December 1824 – 15 April 1864) was the founder of
Donghak, a
Korean religious movement against foreign invasions and critical of
Joseon Dynasty government policies of the time. His teachings led to peasant revolts in Korea which were contemporary with the
Taiping Rebellion in China, and he was martyred by order of the
Daewongun, only weeks before the death of
Hong Xiuquan.