The Quwwat-ul-Islam Mosque is an early congregational mosque in Delhi. Its courtyard, carved pillars, and arched screen mix different building traditions.
Building timeline
Qutb al-Din Aibak begins the mosque
Records date its start to 1192 and its first completion to 1198. The mosque grew in stages.
Aibak adds the five-arched screen
The screen stood between the courtyard and prayer hall. Its arches used corbelling, not true voussoirs.
Iltutmish enlarges the mosque
Iltutmish extends the prayer area and adds more arcades. His reign lasted from 1211 to 1236.
Alauddin Khalji expands the Qutb complex
Alauddin adds the Alai Darwaza and begins a second minaret. The Alai Minar remains unfinished.
Sources: UNESCO’s 1992 Qutb evaluation; UNESCO’s current site description; Sahapedia on the Qutb complex.
The mosque and its changing plan
Quwwat-ul-Islam means “Might of Islam.” Heritage records call it the oldest extant mosque in northern India. The mosque stands inside the Qutb complex, beside the separate Qutb Minar.
A congregational mosque hosts communal Friday prayers. This one had a large courtyard, a prayer hall on the west, and pillared arcades on three sides.
The five-arched screen marked the western side of the court. The largest arch stood at its centre. Stone inscriptions and carved plant forms decorated the screen.
A corbelled arch uses stone courses that project inward. A true arch uses wedge-shaped stones that transfer weight through a curved opening. The screen’s early arches were corbelled.
Sources: UNESCO’s current Qutb complex description; UNESCO’s 1992 Qutb evaluation.
Temple stone and the number 27
The arcades of the mosque contain carved pillars and cladding from older Hindu and Jain temples. Reused building material is often called spolia.
A Persian inscription on the eastern gateway reports material from 27 temples. Scholars doubt that it dates from the mosque’s first building phase. Current heritage records estimate material from some 20 Brahmanical temples.
Temple material is visible in the mosque. The exact count differs across records. Treat 27 as the inscription’s claim. It is not a settled count.
Sources: UNESCO’s current site description; UNESCO’s earlier evaluation.
The Iron Pillar and its inscription
The Iron Pillar stands in the mosque courtyard. It predates the mosque by many centuries. The pillar was brought to Delhi from elsewhere in India.
Its Sanskrit inscription has six lines and calls the pillar a standard of Vishnu. It names a ruler called Chandra. Researcher R. Balasubramaniam identifies him as the Gupta emperor Chandragupta II.
The inscription names Vishnupadagiri as the pillar’s first home. Researchers match this place to Udayagiri, near Vidisha in Madhya Pradesh. That match is a scholarly view. The inscription itself does not name Udayagiri.
The pillar is about 7.02 metres long, with 0.93 metres below ground. Its iron has resisted severe corrosion for roughly 1,600 years. Researchers link that resistance to a protective surface film.
Sources: UNESCO’s Iron Pillar record; R. Balasubramaniam’s Current Science study hosted by IIT Kanpur; CSIR–National Metallurgical Laboratory’s corrosion study record.
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Questions and answers
Why is the mosque not called India’s earliest surviving mosque without qualification?
Heritage records identify it as the oldest extant mosque in northern India. That wording does not claim it is the oldest surviving mosque across all India.
Why is the Iron Pillar inside the mosque courtyard?
The pillar was brought to Delhi from another Indian site. The available records do not securely name the ruler or date of its transfer.
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