The start of Islam is pegged to the first revelation given to Muhammad in 610 AD.
At that time, Mohammed was 40 years old. He and his followers propagate islam throughout the Arabian peninsula.
As at A.D 732, the Islamic empire controlled the middle east, North Africa, Parts of Asia and India and th Iberian peninsula of Spain.
Baghdad was regarded as the Jewel of the Islamic empire because it became an important trading hub.
Baghdad ensured that they were collision of different cultures, knowledge sharing, books, language, and faiths, and this created a cosmopolitan city that developed into a learning centre for the world.
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