Yi Gyu-bo
Writer of the Lay of King Dongmyeong whose collected works record the metal-type printing of the Sangjeong gogeum yemun
In 1193 he wrote the Lay of King Dongmyeong, an epic poem on Jumong, founder of Goguryeo, expressing Goryeo's sense of descent from Goguryeo. He rose to high office under the Choe regime. His collected works, the Donggukisanggukjip, record that the Sangjeong gogeum yemun was printed with metal type on Ganghwa and include the prayer of king and officials explaining that the Tripitaka was carved to drive off the Mongols.