Siri Fort Siri Fort , in the city of New Delhi , was built during the rule of Ala - ud - Din Khalji of the Delhi Sultanate to defend the city from the onslaught of the Mongols . It was the second of the seven cities of medieval Delhi built around 1303 ( stated to be the first entirely constructed by Muslims ) , which at present is seen only in ruins with a few remnants ( pictured ) Near the Siri Fort ruins modern auditoriums , the Asiad Games Village Complex and residential and commercial establishments fill the modern landscape between the Khel Gaon Marg and the Aurobindo Marg in the heart of South Delhi . History . Alaud ' din is the best known of the Khilji dynasty because he extended his dominion to Southern India and established the second city of Delhi , Siri . He created Siri between 1297 and 1307 to defend against Mongol invasions of India and Delhi . In response he built Siri Fort , mimicked massive Turkish ones . The Fort served as the seat of his power during his campaigns to enlarge his territory . Due to frequent Mongol invasions of West Asia , the Saljuq s took asylum in Delhi . The craftsmen of Seljuq dynasty are credited with this era ' s architectural monuments in Delhi . Targhi , a Mongol ruler , besieged the Siri fort when Ala - ud - din Khalji retreated during the Mongol expedition into India . Targhi could not penetrate the fortifications of the Siri Fort and he finally retreated to his Kingdom in Central Asia . But this attack forced Allauddin to strengthen his defenses at the borders which enabled him to keep the Mongols away – Ali Beg and Tartaq and their army – after they attacked and plundered Punjab and Amroha . Alauddin deputed his two generals Ghazi Malik and Malik Kafur to repel the Mongol attack . The Mongol army was soundly beaten before they could return to Central Asia with their plunder ; All the generals and soldiers of the Mongol army were captured and brought to Siri where they were trampled to death by elephants and decapitated . The Mongols tried to attack one last time in 1306 AD but Ghazi Malik ( who was the Governor of Punjab ) annihilated the entire attacking Mongol army ( believed to be 50 , 000 strong ) . Subsequent ruthless attacks by Allauddin ’ s army , deep into Mongol territory in Kandahar , Ghazni and Kabul in Afghanistan ensured that Mongols would never attack India again . His military strategies were thus aimed at building an Indian Empire , which he had mostly succeeded . He consolidated his territory , ruled with military might for 20 years and was considered the “ first real Emperor of India ” . Siri , which is now a part of New Delhi , was later linked to the fortifications of Jahanpanah . Siri was then also known as “ Darul Khilafat ” or ‘ ’ Seat of Califate ’ ’ In 1398 AD , Timur lane , the Mongol ruler who invaded Delhi , wrote in his memoirs , “ the Siri is a round city . Its buildings are lofty . They are surrounded by fortifications built of stone and brick , and they are very strong – from the fort of Siri to that of Old Delhi , which is a considerable distance – there runs a strong wall built of stone and cement . The part called Jahanpanah is situated in the midst of the inhabited city . The fortifications of the three cities ( old Delhi , Siri and Tughlaqabad ) have thirty gates . Jahanpanah has thirteen gates , Siri has seven gates . The fortifications of the Old Delhi have ten gates , some opening to the exterior and some towards the interior of the city . ” Legend . According to the legend of Ala - ud - din ’ s war exploits , the name Siri given to the Fort was because the foundation of the fort was built on the severed heads ( ‘ Sir ’ in Hindi means “ head ” ) of about 8 , 000 Mongol soldiers killed in the war . Another version of the legend refers to the war crimes committed by Allauddin when the Mongol army was defeated and the captured soldiers were brought to Siri and trampled by elephants , then their severed heads were hung on the walls of the Siri Fort . Structure . It is near to the Shahpur jat village inhabitied by Jats of the Panwar Gotra . Siri Fort was built to the north - east of the Qutab Minar on an old camp near Delhi . The first city is considered to be built by Muslims , it was in an oval shape ; its ruins are presently seen in an area of about . Allauddin , the second ruler of the Khilji dynasty , laid the foundation for the City of Siri in 1303 AD . The structures built in Siri were stated to have had a fine imprint of the enthusiasm of the rulers of Khalji dynasty ( particularly , the first three out of six Rulers of the Dynasty ) with Allauddin ' s deep interests in architecture and his achievements supported by the imported skills of the artists of Saljuqs richly contributing to the efforts to build the new city . Legend states that Allauddin ' s prolific building involved engagement of 70 , 000 workers . The city was built with an oval plan with palaces and other structures . There were seven gates for entry and exit , but at present only the Southeastern gate exists . The fort was once considered the pride of the city for its palace of a thousand pillars called the Hazar Sutan . The palace was built outside the fort limits , and had marble floors and other stone decoration . Its Darwaza ( door ) is supposed to have been beautifully decorated . In eastern part of the ruins there are remnants of flame shaped battlements , loop holes for arrows , and bastions , which were considered unique new additions of that period . In the nearby Shahpur Jat village ( pictured ) , some dilapidated structures of the period are seen . Tohfewala Gumbad Masjid ( pictured ) is one such structure whose ruins show the form of domed central apartment and sloping wall characteristic of Khaljis architecture . Apart from building the Siri Fort , the citadel around it and the water supply system with a reservoir at Hauz Khas Complex ( in present Hauz Khas locality ) for providing water supply to Siri , his new city , Ala - ud - din also expanded the building activity around the religious city of the first city complex of Qutb complex by making additions to the Quwwatul - Islam Mosque , which doubled its original size , additions to the Qutub Minar itself ( Nagari inscriptions on the tower attribute to this tower as " " Vijaya sthamba " " or victory tower of Ala - ud - din ) and a grandiose plan of constructing a new Minar ( tower ) bigger ( double ) that of the Qutub Minar . This plan was left half completed , as may be seen from the ruins at the site , due to the death of Allauddin in 1316 . The destruction of the Fort is attributed to the local rulers who removed the fort ' s stones , bricks and other artifacts for their own buildings . In particular , Sher Shah Suri ( 1540 – 1545 ) , of Pashtun Afghan descent from Eastern India ( Bihar ) , took away material from Siri to build his own city . The battered walls of the fort had a wider base on the outside . A protected passage was provided within the battered walls ( now seen in ruins as pictured ) . Excavation . The rest of the structures remained unexplored by Archeologist s and these were unknowingly buried when the Asiad Village Complex was built in 1982 for the Asiad 1982 . ASI has now launched an excavation programme , since December 2008 , to unearth some portions of the wall concealed for centuries which will enable exposing the entire wall providing a continuous link with the earlier excavated stretches of the wall . Siri Fort Sports Complex . Near the ruins of the ancient fort city , the Asian Village Complex , popularly known as the Siri Fort Complex , was developed during the Asiad 1982 ( the 1982 Asian Games ) sports event . The complex was developed in the land around the Siri Fort ruins for the sports event involved . Among these buildings are a large sports complex of courts for tennis , badminton and basketball , a swimming pool , a golf course , gymnasium , aerobics centre , jogging tracks , cricket grounds , large auditoriums , upscale residential buildings , deluxe food joints and commercial establishments . This complex is now under further refurbishing and expansion for the 2010 Commonwealth Games , amidst protests and court interventions . As part of beautifying the ancient monuments before the 2010 Commonwealth Games , the Archeological Survey of India ( ASI ) , the custodians of heritage monuments in Delhi , have begun restoration works of several structures which includes the Siri Fort walls . According to their evaluation of three stretches of the fort walls , the first stretch nearer to the Asiad Village is in good shape , the second stretch next to the Panchsheel Park would need conservation actions costing Rs 50 lakhs ( US $ 100 , 000 ) and the third stretch next to the Asiad village needs conservation measures costing Rs 5 lakhs ( US $ 10 , 000 ) . In addition , the stretch adjoining Panchsheel Park , which has been evaluated as in a bad shape , has also been identified for undertaking restoration works at a cost of Rs 30 lakhs ( US $ 60 , 000 ) . The Fort is located at the southern end of Hauz Khas and is from Delhi . It is approachable from Panchseel road in South Delhi . The road from Moolchand to Chirag Delhi passes through the middle of the fort precincts . Siri Fort Auditorium auditorium complex ( four auditoriums ) within the Siri Fort area run by the Directorate of Film Festivals , Government of India has a combined seating capacity of over 2 , 500 . It is a prestigious entertainment centre in New Delhi where film festivals , dance performances , plays and music recitals are organized .