Ganghwa Seonwonsa Temple Site was first discovered in 1976 during a surface examination around Ganghwado Island undertaken by the Ganghwado Island Academic Research Team of Dongguk University. The site was designated as Historic Site No. 259 in 1977. Seonwonsa Temple was built by General Choi Wu in 1245 (the 32nd year of King Gojong’s reign during the Goryeo dynasty), which was right after the transfer of the capital to Ganghwado during resistance against the Mongolian invasion.