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Iltutmish had set up a good administration with proper taxation. He completed the Quwwat-ul-Islam mosque and Qutb Minar which was begun by Quttubudin Aibak .
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Al-beruni was the slave of Mahmud of Ghazni he wrote the book kitab-ul-hind which is still widely read because it tells about the geography and history if India.
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Mahmud of Ghor conquered Punjab and Lahore. He defeated Delhi's ruler Privthiviraj Chauhan in second battle of tarain in 1192. He led the formation of Muslim rule in India.
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Qutbuddin Aibak proved to be a wise and just ruler. He treated the Hindus with kindness. He also built two mosques named Quwwat-ul-Islam and another one in Ajmer
