The West Comes Knocking | The Fall of Joseon, part 18 (1791-1801)

When a Dutch sailor shipwrecked on Jeju in 1627, he thought he’d been captured by cannibals. Instead, he became Korea’s first Westerner—and the first sign of change that would shake Joseon to its core.

This episode traces the arrival of Western guns, God, and ideas—from Jan Janse de Weltevree to the Catholic persecutions of 1801—as Korea’s Confucian order faces its first real collision with the West.

       

 

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The West Arrives: Cannibals, Cannons, and Catholicism in Joseon

When King Jeongjo took the throne in 1776, he tried to reform a kingdom torn apart by factions and tradition. But the real challenge was still to come—from beyond the sea.

The story begins not with missionaries or merchants, but with a shipwreck. In 1627, a Dutch sailor named Jan Janse de Weltevree washed ashore on Jeju Island. Expecting to be eaten by “cannibals,” he instead became the first Westerner to live in Korea. Over time, he took a Korean name—Park Yeon, passed the civil service exam, married, and commanded troops. When fellow Dutch castaway Hendrick Hamel met him years later, Weltevree’s Korean was flawless… and his Dutch was nearly gone.

Joseon’s Confucian order saw itself as the last bastion of civilization in a barbaric world. But small cracks had formed. Through China, books like Matteo Ricci’s True Principles of Catholicism introduced Western science and Christianity. To some, it was dangerous heresy. To others, a breath of fresh air in a stale system.

By the late 18th century, reform-minded scholars began embracing Seohak, or “Western Learning.” They admired Europe’s science and technology but ignored its faith. Others—especially from poor or marginalized families—found Catholicism’s message of equality too powerful to resist.

King Jeongjo tried to keep the peace. But after his death in 1800, the regent Queen Dowager Jeongsun and her conservative Byeokpa allies cracked down hard. The first Korean Catholics were executed for performing non-Confucian funeral rites. By 1801, more than 300 believers were executed, thousands imprisoned or exiled—including members of the royal family.

What began with one stranded sailor ended with Korea’s first religious persecution—and a nation split between old beliefs and new worlds.