宝库 (bǎo kù): treasure-house; treasury; treasure-trove (often fig., book of treasured wisdom)

This museum houses thousands of ancient artifacts and is called a treasure-house of Chinese culture.

For scholars studying history, this library is like a treasure-house, containing many precious materials.

My grandfather often tells me that life experience is a treasure-house, worth slowly excavating.

This ancient temple is not only a religious holy site but also a treasure-house of art, attracting tourists from all over the world.

The Internet is a huge treasure-house of information; we can acquire all kinds of knowledge from it.

The Mogao Caves in Dunhuang are a treasure-house of Buddhist art, preserving a large number of exquisite murals and sculptures.