Iryeon’s Samguk yusa
The monk Iryeon compiled the Samguk yusa, recording the Dangun founding legend of Gojoseon, Buddhist history, folk tales and hyangga songs — an assertion of Korean historical identity under Yuan domination.
Salamander724 · Public domain · Source
The Samguk yusa was the first work to record the Dangun legend, tracing Korean history back to Gojoseon. It preserves the myths, legends, Buddhist stories and fourteen hyangga omitted by the Samguk sagi, making it invaluable for early literature and belief. Its exact date is unknown; it is thought to have been compiled around 1281, in Iryeon’s last years at Ingaksa in Gunwi.
Yi Seung-hyu’s Jewang ungi (1287) likewise made Dangun the founder of Korean history and set it in verse alongside Chinese history. Both reflect a sense of national identity under Yuan interference.