also: ぶんしょかん
noun
Refers to a building or institution where historical documents and records are stored and preserved.
市の文書館で古い地図を見つけた。
I found an old map at the city archives.
この文書館には江戸時代の資料がたくさんある。
This archive has many documents from the Edo period.
Compound of 文書 (document) and 館 (building). The reading もんじょかん uses the older reading もんじょ for 文書, while ぶんしょかん uses the more common modern reading.