noun, noun or participle which takes 'suru'
entry (into a building); entering (a library, museum, etc.)
Used for entering a public or institutional building, especially libraries, museums, and similar facilities. Often seen in signs and rules.
図書館に入館するときは、カードが必要です。
You need a card to enter the library.
博
The museum admission fee is 500 yen for adults.