Rubuta ci gaba don wannan sakin layi - Rubutun farko na Seonangdang yana cikin Goryeosa, littafin tarihin da aka rubuta game da Daular Goryeo a karni na 15. A cewar littafin, a zamanin Sarki Munjong na Goryeo, an gina 'Seonghwangsa', ma'ana 'Haikalin Seonghwang'. A cikin Daular Goryeo, sanannen sanannen Seonangdang yana cikin garin Jeonju. Sarki Gojong ya yi imanin cewa da yawa daga cikin Mongols a cikin Mongol mamayewa na Korea
sun kasance saboda Seonangshin ya taimaka wa Koriya.