Changed the official religion to Christianity, and changed the official language from Latin to Greek.

The Byzantine Empire

Explanation:

The Byzantine Empire began when Roman emperor Constantine I decided to relocate the capital to the ancient Greek colony. The Byzantine Empire thrived because of its location. Constantinople as capital became the centre of a trade route. The Byzantine Empire official religion became Christianity and converted the official language from Latin to Greek. The major contribution of the empire was to preserve the Greek language and culture.

. austria-hungary began seizing british colonies in africa.

conformal maps greatly distort _sizes_ of continents in higher latitudes.

the answer is sizes.