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There is no Islamic Empire.
The Greek Empire was before the Roman Empire and many people say that the Greeks are really advanced in things like math.
The title of the Islamic Empire was Caliphate. The Caliph was called Amir-ul-Momineen.
romans
Alot of them.
The Japanese borrowed ideas such as writing system, architecture, Buddhism, Confucianism, and government structure from China. The adoption of these elements greatly influenced the development of Japanese culture and society.
It depends on the Islamic Empire in question. Assuming that you are talking about the Abbassid Caliphate (which is most commonly referred to as "the Islamic Empire"), the group that brought them down was the MONGOLS.
In 1492 the Islamic Empire finally left Spain but i dont know when it began.
Yes. Except Thais don't borrow; they steal!
Yes. The Mughal Empire was a great Empire of the Muslims in India.
Roman
Different in different parts of the empire.