The Ottoman Empire was once a powerful empire that existed in the Middle East.

He is studying the history of the Roman Empire.

Imperialism has played a significant role in history.

The history of the British Empire is very interesting.

The Byzantine Empire, also known as the Eastern Roman Empire, was a powerful empire with a long history.

The Byzantine Empire is a state that developed from the eastern part of the Roman Empire.

The Central African Empire was historically important.

The Russian Empire was a nation that existed from 1721 to 1917.

The Korean Empire was a nation that existed from 1897 to 1910.

His grandfather was a member of the Imperial Navy during World War II.