The Red Fort or Lal Qila is a historic fort in the Old Delhi neighbourhood of Delhi, India, that historically served as the main residence of the Mughal emperors. Emperor Shah Jahan commissioned construction of the Red Fort on 12 May 1639, when he decided to shift his capital from Agra to Delhi. Originally red and white, its design is credited to architect Ustad Ahmad Lahori, who also constructed the Taj Mahal. The fort represents the peak in the Mughal architecture under Shah Jahan and combines Persian palace architecture with Indian traditions.

Mughal architecture is the type of Indo-Islamic architecture developed by the Mughals in the 16th, 17th and 18th centuries throughout the ever-changing extent of their empire in the Indian subcontinent. It developed from the architectural styles of earlier Muslim dynasties in India and from Iranian and Central Asian architectural traditions, particularly Timurid architecture. It also further incorporated and syncretized influences from wider Indian architecture, especially during the reign of Akbar. Mughal buildings have a uniform pattern of structure and character, including large bulbous domes, slender minarets at the corners, massive halls, large vaulted gateways, and delicate ornamentation; examples of the style can be found in modern-day Afghanistan, Bangladesh, India and Pakistan.