<P> Notable settlements to have been established in the region include: </P> <Ol> <Li> Indraprastha, supposedly built by the Pandavas . </Li> <Li> Surajkund (Anangpur), Tomar city dating from the 9th or 10th century, where a large masonry tank can be found . </Li> <Li> Lalkot, built ca . 1052 A.D. by the Tomara ruler, Anangpal . In ca . 1180 A.D. Prithviraj Chauhan extended and fortified it as a defence against invaders; the city then became known as Qila Rai Pithora . This area, now called as Mehrauli, was also the seat of the Mamluk (Slave) dynasty . </Li> <Li> Siri, first established as a camp for protection against invading Mongols by Alauddin Khalji, and fortified in about ca . 1303 A.D. </Li> <Li> Tughluqabad, built by Ghiyasuddin Tughluq in ca . 1320 A.D. A subsidiary fort Adilabad was built by his son Muhammad bin Tughlaq in ca . 1325 A.D. </Li> <Li> Jahanpanah, Refuge of the World, name given to the area enclosed by walling - in of the suburbs between Qila Rai Pithora and Siri, built by Muhammad bin Tughluq in ca . 1325 A.D. </Li> <Li> Ferozabad, built by Firuz Shah Tughluq in ca . 1354 A.D.; all that remains is the palace, known as Feroz Shah Kotla . Feroz Shah's building activity indicates that the suburbs were still occupied; major mosques were built inside Jahanpanah (Khirki and Begumpur) and Nizamuddin; and the area around Khalji reservoir Hauz Khas was developed . </Li> <Li> Dinpanah built by Humayun and Shergarh built by Sher Shah Suri, both in the area near the speculated site of the legendary Indraprastha (1538--1545). </Li> <Li> Shahjahanabad, the walled city built by Shah Jahan from 1638 to 1649, containing the Lal Qila and the Chandni Chowk . It was the capital of the Mughal Empire during Shah Jahan's reign . It is presently referred to as "Old Delhi". </Li> <Li> Lutyens' Delhi or New Delhi, the city built by the British on the south - west, declared Capital on 12 December 1911 . On 12 December 2011 New Delhi celebrated 100 years of serving as India's National Capital . </Li> </Ol> <Li> Indraprastha, supposedly built by the Pandavas . </Li> <Li> Surajkund (Anangpur), Tomar city dating from the 9th or 10th century, where a large masonry tank can be found . </Li>

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