300
1. Last stand of the Sambyeolcho took place in Jeju in Goryeo dynasty.(Sambyeolcho army was the last resistance of Korea from the Mongolians.)
2. Hendrick Hamel a first westerner who wrote about Joseon dynasty to Europe, first landed in Jeju.
3. 4.3 incident happened in Jeju.
List three historical fact in Jeju