Shah Jahan commissioned the Red Fort in 1638 when he decided to shift his capital from Agra to Delhi. Construction took nearly 10 years (1639-1648). Shah Jahan is also famous for building the Taj Mahal. Akbar built Fatehpur Sikri and Jahangir built gardens like the Shalimar Bagh, but not the Red Fort. Alamgir (Aurangzeb) expanded the Mughal empire but did not build the Red Fort.