The roof tiles with inscriptions are very important archeological materials which can reveal the historical facts for the matter of using the fortified castle.
This dissertation researched about roof tiles with inscriptions which were excavated from the Castle during the period of Goryeo Dynasty located in South Korea. Chinese characters are incised on the roof tiles such as Reign name.
In the castle of Goryeo Dynasty, there have been found six kinds of roof tiles with inscription of the sexagenary cycle. These are Junpungsanyeon(峻豊四年, 963), Geondeoksamnyeon(乾德三年, 965), Taepyeong heunggukchillyeon․pallyeon(太平興國七年·八年, 982․983), Daepyeongpallyeon(大平八年, 1028), Daepyeongsibyeon(大平十年, 1030), Daepyeongsiboyeon(大平十五年, 1035), Jeongpunginyeon(正豊二年, 1157) and Jijeongsippallyeon(至正十八年, 1358).
Until now nine castles containing the roof tiles with inscription of the sexagenary cycle have been were excavated are nine. Those are Eumseong Mangisanseong(峻豊四年, 太平興國七年․八年), Pyeongtaeng Bipasanseong(乾德三年), Buyeo Busosanseong(大平八年), Jindo Youngzhangseong(大平十年), Sacheon Seonjilliseong(大平十五年), Cheongju Cheongjue upseong(大平), Busan Danggamdongseong(大平), Masan Hoewonhyeonseong(正豊二年), Inje Hangyesanseong(至正十八年).
King Kwangjong tried to strengthen royal power. For intensifying the royal authority, So Kwangjong liquidated many founding contributor. He also worried about the feasible rebellions by his opponents'. He wanted to quash the rebellion if the uprising break out. Because of that, he had built and repaired many fortress and temples at the central districts of Goryeo. This policy had continued to King Seongjong. This article could assume the historical facts above by roof tiles which were excavated from Mangisanseong and Bipasanseong.
The roof tiles with inscription of Daepyeongpallyeon(大平八年, 1028) and Daepyeongsibo(大平十五年, 1035) can be a evidence of the historical facts that King Hyeonjong built storehouses in the castle. These storehouses are closely related with traffic routes, taxes and military camp.
In this article, it proved that Mongolian army rebuilt a castle for the preparation of the invasion of Japan. The roof tiles with inscription of Jeongpunginyeon(正豊二年, 1157) can be a evidence of author’s view. and Jijeongsippallyeon(至正十八年, 1358) can be a proof that Japanese pirate raiders invaded to the inland and the government needed to refuge the civilians to the Inje Hangyesanseong in the period of King Gongmin and King Yu.