Who construct the first balcony of qutab minar?

The first balcony of the Qutub Minar was constructed during the reign of Qutb al-Din Aibak, the founder of the Delhi Sultanate, in the late 12th century. The structure was later completed and further modified by his successor, Iltutmish, who added additional levels and balconies. The Qutub Minar is a UNESCO World Heritage Site, showcasing Indo-Islamic architecture.