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There is no Islamic Empire.
poetry was inspired by sufism, and there were many Arab and Islamic stories
The greatest achievement of the Inca empire was the building of Macchu Picchu.
The title of the Islamic Empire was Caliphate. The Caliph was called Amir-ul-Momineen.
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. The Mughal Empire was a great Empire of the Muslims in India.
Hagia Sophia
Different in different parts of the empire.
Ottoman Empire
The Abbasids, as the ones from the Islamic Empire.
The interesting achievement of the Muslim Empire led to the preservation of various prehistorical sites and led to discovery of some medicine.