Title: Qutb Minar
Content:  The Qutb Minar was built over the ruins of the Lal Kot, the citadel of Dhillika. Qutub Minar was begun after the Quwwat-ul-Islam Mosque, which was started around 1192 by Qutb-ud-din Aibak, first ruler of the Delhi Sultanate. It is usually thought that the tower is named for Qutb-ud-din Aibak, who began it. It is also possible that it is named after Khwaja Qutbuddin Bakhtiar Kaki a 13th-century sufi saint, because Shamsuddin Iltutmish was a devotee of his. The Minar is surrounded by several historically significant monuments of the Qutb complex. Quwwat-ul-Islam Mosque, to the north-east of the Minar was built by Qutub-ud-Din Aibak in A.D. 1198. It is the earliest extant - mosque built by the Delhi Sultans. It consists of a rectangular 
Title: Qutb Minar complex
Content:  The Qutb Minar complex are monuments and buildings from the Delhi Sultanate at Mehrauli in Delhi, India. .The complex was built over demolished ruins of ancient Jain and Hindu site. Construction of the Qutub Minar "victory tower" in the complex, named after the religious figure Sufi Saint Khwaja Qutbuddin Bakhtiar Kaki, was begun by Qutb-ud-din Aibak, who later became the first Sultan of Delhi of the Mamluk dynasty (Gulam Vansh). It was continued by his successor Iltutmish (a.k.a. Altamash), and finally completed much later by Firoz Shah Tughlaq, a Sultan of Delhi from the Tughlaq dynasty (1320-1412) in 1368 AD. The Qubbat-ul-Islam Mosque (Dome of Islam), later corrupted into Quwwat-ul Islam, stands next to the Qutb Minar. Many subsequent rulers, including the Tughlaqs, Alauddin Khalji and the British added structures to the 
Title: Qutb Minar
Content:  Qutb-ud-din Aibak, a deputy of Muhammad of Ghor, who founded the Delhi Sultanate after Muhammad of Ghor's death, started construction of the Qutb Minar's first story in 1199. Aibak's successor and son-in-law Shamsuddin Iltutmish completed a further three stories. After a lightning strike in 1369 damaged the then top story, the ruler at the time, Firuz Shah Tughlaq, replaced the damaged story and added one more. Sher Shah Suri also added an entrance while he was ruling and the Mughal emperor Humayun was in exile.
Title: Qutb Minar complex
Content:  of India and the oldest surviving example of Ghurids architecture in Indian subcontinent. The construction of this Jami Masjid (congregational mosque), started in the year 1193 AD, when Aibak was the commander of Muhammad Ghori's garrison that occupied Delhi. To leave the imprint of his religion to the new territory, Aibak decided to erect a mosque epitomising the might of Islam and chose his site, the heart of the captured Rajput citadel of Qila Rai Pithora. The Qutub Minar was built simultaneously with the mosque but appears to be a stand-alone structure, built as the 'Minar of Jami Masjid', for the 
Title: Qutb Minar complex
Content:   The Quwwat-ul-Islam (قوة الإسلام) mosque, also known as the Qutub Mosque or the Great Mosque of Delhi, was commissioned by Qutb-ud-din Aibak, founder of the Mamluk or Slave dynasty and built using spolia from 27 Hindu and Jain temples. It was built over the site of a large temple located in the centre of a citadel. "'The conqueror entered the city and its vicinity was freed from idols and idol-worship; and in the sanctuaries of the images of the gods, mosques were raised by the worshippers of the one God.'" It was the first mosque built in Delhi after the Islamic 
Title: Qutb Minar
Content:  The Qutub Minar, also spelled as Qutb Minar and Qutab Minar, is a minaret and "victory tower" that forms part of the Qutb complex. It is a UNESCO World Heritage Site in the Mehrauli area of South Delhi, India. It is one of most visited tourist spots in the city due to it being one of the earliest that survives in the Indian subcontinent. It can be compared to the 62-metre all-brick Minaret of Jam in Afghanistan, of c. 1190, which was constructed a decade or so before the probable start of the Delhi tower. The surfaces of both are elaborately decorated with inscriptions and geometric patterns. The Qutb Minar has a shaft that is fluted with "superb stalactite bracketing under the balconies" at the top of each stage. In general, minarets were slow to be used in India and are often detached from the main mosque where they exist.
Title: Delhi Sultanate
Content:  who appointed Jalal ud-Din Firuz Khalji as the commander of the army. Khalji assassinated Qaiqabad and assumed power, thus ending the Mamluk dynasty and starting the Khalji dynasty. Qutb al-Din Aibak initiated the construction of the Qutub Minar. It is known that Aibak started the construction of Qutb Minar but died without completing it. It was later completed by his son-in-law, Iltutmish. The Quwwat-ul-Islam (Might of Islam) Mosque was built by Aibak, now a UNESCO world heritage site. The Qutub Minar Complex or Qutb Complex was expanded by Iltutmish, and later by Ala ud-Din Khalji (the second ruler of the Khalji dynasty) in the early 14th century. During the Mamluk dynasty, many nobles from Afghanistan and Persia migrated and settled in India, as West Asia came under Mongol siege.
Title: Qutb Minar
Content:  around Peshawar in 1177, and the region of Sindh in 1185-86. In 1193, Qutb al-Din Aibek conquered Delhi and implemented a Ghurid governorship in the province, and the congregational mosque, the Qutb Minar complex, was founded in 1193. In the past, scholars believed that the complex was constructed to promote a conversion to Islam amongst the Ghurids' new subjects as well as a symbol of the Ghurids' adherence to a socio-religious system. There is now new information to suggest that conversion to Islam was not a top priority of the new annexes and instead the Ghurid governors sought to make a synthesis of the local culture and Islam through negotiation.
Title: Mini Qutub Minar
Content:  The Mini Qutub Minar (local: Chhota Qutub Minar, Mini Minar, Kaushal Minar, Hastsal ki Laat) is a minaret tower in Hastsal village in Uttam Nagar, West Delhi, India. It was built in the 1650 by Mughal emperor, Shah Jahan (reign, 1628-1658) near his hunting lodge in Hasthal. The three storeyed tower is 16.87 meters (55 feet) tall and stands on a raised octagonal platform. The minar is built with bricks and clad with red sandstone. The tower structure and design resembles the Qutub Minar of Delhi and was inspired by it. Originally, the Mini Qutub Minar was a 5 storeyed tower, topped out with a domed Chhatri pavilion at the top. It was used by emperor Shah Jahan for his entertainment after hunting in the all encompassing wilderness that used to surround this colossal Hastsal minaret and royal hunting lodge. The emperor's Shikargah or hunting lodge is situated a few hundred metres from the minaret tower. The Mini Qutub Minar is a 'Grade A' listed, protected heritage monument with the Department of Archaeology, India.
Title: Qutb Minar complex
Content:  Tower, to celebrate the victory of Muhammad Ghori over the Rajput king, Prithviraj Chauhan, in 1192 AD, by his then viceroy, Qutb-ud-din Aibak, later the first Sultan of Mamluk dynasty. Its construction also marked the beginning of Muslim rule in India. It was built using red sandstone and marble. Inscriptions record that 27 Hindu and Jain temples were torn down and used for its creation. Even today the Qutb remains one of the most important "Towers of Victory" in the Islamic world. Aibak however, could only build the first storey, for this reason the lower storey is replete with eulogies to 

Question: who caused to build qutub minar in delhi?
Answer: Iltutmish.
Firoz Shah Tughlaq.