This is the 5029th most frequent Japanese word.
舘
A building, hall, or mansion.
Here, '舘' is used in the compound word '美術舘' which refers to an 'art museum' or 'gallery', showing that '舘' denotes a building or establishment.
この美術舘は素晴らしい絵画を展示しています。
This art museum displays amazing paintings.
In this sentence, '舘' appears in '図書舘', meaning 'library', illustrating the use of '舘' to represent a place or facility.
図書舘で本を借りることができます。
You can borrow books at the library.
Here, '舘' denotes a specific type of building or structure, found as part of the name '寺舘' indicating a temple's building.