The Afghans of Ghor thus rose to power on the downfall of the Turks of Ghazni. The founder of the family is said to have been Izzud-din al Husain, whose son Ala-ud-din destroyed Ghazni, as already mentioned. Ala-ud-din had two nephews, Ghiyas-ud-din and Muiz-ud-din, the latter of whom, also called Shahab-ud-din by Mussulman chroniclers, and generally known in history as Mahommed Ghori, is the second of the great Mahommedan conquerors of India. In 1175 he took Multan and Uchch; in 1186 Lahore fell into his hands; in 1191 he was repulsed before Delhi, but soon afterwards he redeemed this disaster. Hindustan proper was at that period divided between the two Rajput kingdoms of Kanauj and Delhi. Mahommed Ghori achieved his object by playing off the rival kings against each other. By 1193 he had extended his conquests as far east as Benares, and the defeated Rajputs migrated in a body to the hills and deserts now known as Rajputana. In 1199 one of his lieutenants, named Bakhtiyar, advanced into Bengal, and expelled by an audacious stratagem the last Hindu raja of Nadia. The entire northern plain, from the Indus to the Brahmaputra, thus lay under the Mahommedan yoke. But Mahommed Ghori never settled permanently in India. His favourite residence is said to have been the old capital of Ghazni, while he governed his Indian conquests through the agency of a favourite slave, Kutb-ud-din. Mahommed Ghori died in 1206, being assassinated by some Ghakkar tribesmen while sleeping in his tent by the bank of the Indus; on his death both Ghor and Ghazni drop out of history, and Delhi first appears as the Mahommedan capital of India. The Slave Dynasty. On the death of Mahommed Ghori, Kutb-ud-din at once laid aside the title of viceroy, and proclaimed himself sultan of Delhi. He was the founder of what is known as the slave dynasty, which lasted for nearly a century (1206-1288). The name of Kutb is preserved in the minar, or pillar of victory, which still stands amid the ruins of ancient Delhi, towering high above all later structures. Kutb himself is said to have been successful as a general and an administrator, but none of his successors has left a mark in history. Ala-ud-din.