Humayun's tomb is a complex of buildings built as the Mughal emperor Humayun's tomb, commissioned by Humayun's wife Hamida Banu Begum in 1562 and designed by Mirak Mirza Ghiyath, a Persian architect. It was the first garden-tomb on the Indian subcontinent. It was also the first structure to use red sandstone at such a large scale. The complex encompasses the main tomb of the Emperor Humayun, which houses the graves of his wife, Hamida Begum and also Dara Shikoh, son of the later Emperor Shah Jahan as well as numerous other subsequent Mughals, including Emperor Jahandar Shah, Farrukhsiyar, Rafi Ul-Darjat, Rafi Ud-Daulat and Alamgir II. It was also placed in the centre of a 30-acre Char Bagh Garden (Four Gardens), a Persian-style garden with quadrilateral layout and was the first of its kind in the South Asia region in such a scale. Humayun's Tomb is one of the two Unesco World Heritage sites in Delhi, the other being the Qutub Minar.