It is difficult to answer. are you asking the biggest in size or in population and if in population it depends on the relative world population at that time. Any how, refer to links belowfor more information.
The Roman Empire was the largest at that time.
In the list of largest empires the Roman Empire come in at 16th.
However the Roman Empire was composed of valuable real estate. The largest empires have a lot of desert, tundra, taiga and general wilderness in them.
No, the Ottoman Empire was not the largest. At its peak, the British Empire was the largest.
Ottoman Turkish Empire
There is no Islamic Empire.
In 1492 the Islamic Empire finally left Spain but i dont know when it began.
The Abbasids, as the ones from the Islamic Empire.
The biggest amphitheater in the Roman empire was the Colosseum.
The Mongol Empire
There is no Islamic Empire.
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.
Sunnis is the biggest Islamic school. The other one is Shiites. refer to related question for more information.
Yes. The Mughal Empire was a great Empire of the Muslims in India.
Different in different parts of the empire.
Ottoman Empire
The Abbasids, as the ones from the Islamic Empire.
The Colosseum at Rome was the biggest amphitheater in the empire.
Rome was the biggest city in the Roman Empire.
The biggest amphitheater in the Roman empire was the Colosseum.