who started and completed the construction of qutub minar
Qutb Minar Qutab Ud-Din-Aibak, founder of the Delhi Sultanate, started construction of the Qutub Minar's first storey around 1192. In 1220, Aibak's successor and son-in-law Iltutmish completed a further three storeys. In 1369, a lightning strike destroyed the top storey. Firoz Shah Tughlaq replaced the damaged storey, and added one more.Sher Shah suri also added an entrance to this tower while he was ruling and Humayun was at an exile.[5]
Jama Masjid, Delhi Mughal emperor Shah Jahan built the Jama Masjid between 1644 and 1656. It was constructed by more than 5000 workers. It was originally called Masjid-i-Jahan-Numa, meaning 'mosque commanding view of the world'. The construction was done under the supervision of Saadullah Khan, wazir (or prime minister) during Shah Jahan's rule. The cost of the construction at the time was one million Rupees.[1] Shah Jahan also built the Taj Mahal, at Agra and the Red Fort in New Delhi, which stands opposite the Jama Masjid. The Jama Masjid was completed in 1656 AD (1066 AH).[1] The mosque was inaugurated by an Imam Bukhari, a mullah from Bukhara, Uzbekistan, on 23 July 1656, on the invitation from Shah Jahan.[2] About 25,000 people can pray in the courtyard at a time and it is sometimes regarded as India's largest mosque.[3][4] The mosque is commonly called "Jama" which means Friday.[1]