The was responsible for preserving works from ancient Rome, ancient Greece, China, India, Persia, ancient Egypt, and ancient Mesopotamia.

The British Museum

Explanation:

The British Museum is one of the most important museums in the world, and has works from ancient Rome, Greece, China, India, Persia, Egypt and Mesopotamia.

The reason for this variety of works is that the British Empire spanned over many parts of the world, and while those countries were under colonial British rule, the British took many artifacts and sent them back to England.

unless they converted, many non-christians (mainly jews and muslims) were persecuted

51% were unhappy, i think .   ; )