who completed the qutub minar and in whose memory was it built
Qutb Minar Qutb 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.[5]