What does 本館 mean?
本館 is a Japanese noun meaning “main building” in English. It can also be translated as “this library” depending on context. It is written as 本館 in kanji, ほんかん in hiragana, and honkan in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
別館は本館の北側にある。
The annex is on the north of the original building.