who started the construction of qutab minar at delhi
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 Shamsuddin 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 in exile.[5]
Adhai Din Ka Jhonpra The original building was partially destroyed and converted into a mosque by Qutb-ud-Din-Aibak of Delhi in the late 12th century. According to a local legend, after defeating Vigraharaja's nephew Prithviraja III in the Second Battle of Tarain, Muhammad Ghori passed through Ajmer. There, he saw the magnificent temples, and ordered his slave general Qutb-ud-Din-Aibak to destroy them, and construct a mosque – all within 60 hours (that is, ​2 1⁄2 days). The artisans could not build a complete mosque in 60 hours time, but constructed a brick screen wall where Ghori could offer prayers. By the end of the century, a complete mosque was built.[1]