also: こうしょでん
noun
pavilion housing the historical archives (in Heian Palace)
Historical term for one of the seventeen halls (十七殿) within the Heian Palace complex, specifically used to store historical records and documents.
See also: 十七殿
校書殿は平安宮の十七殿の一つで、歴史書を保管していた。
The Kyōshoden was one of the seventeen halls of the Heian Palace, where historical records were kept.
十七殿 refers to the seventeen main halls of the Heian Palace, of which 校書殿 is one specific pavilion.
From 校書 (kyōsho, 'collation of books' or 'historical records') + 殿 (den, 'hall' or 'pavilion'). The exact historical derivation is uncertain; the term is specific to the Heian Palace architecture.