Delhi Map 1206 CE — Delhi Sultanate

Iltutmish receives formal investiture from the Abbasid Caliph

Sultan Shamsuddin Iltutmish received an official deed of investiture from Abbasid Caliph Al-Mustansir in 1229 CE, establishing sovereign legitimacy for the Delhi Sultanate in the wider Islamic world.

Source: Encyclopaedia Britannica — Iltutmish

Alauddin Khalji institutes price controls and market regulations

Alauddin Khalji implemented strict price controls, grain storage reserves, and market inspectors (shahna-i-mandi) in Delhi to maintain a large standing army against Mongol invasions.

Source: Encyclopaedia Britannica — Alauddin Khalji

Successive capitals reshape the Delhi plain

Early Delhi sultans reused the older Lal Kot–Qila Rai Pithora area around Mehrauli. Later dynasties founded fortified capitals including Siri, Tughlaqabad, Jahanpanah and Firozabad, leaving an urban record of changing political ambitions.

Source: Delhi Tourism: Eight Cities of Delhi

Razia claims the sultan’s office

Razia ruled in her own name from 1236 to 1240, an exceptional challenge to the gender expectations of the military elite. Her short reign shows both the possibilities and constraints of court politics.

Source: Britannica: Razia Sultan

The Qutb complex records conquest and adaptation

Aibak began the Qutb Minar and Iltutmish completed major sections while expanding the surrounding complex. Builders reused earlier materials and developed new forms, making the site a difficult archive of rupture, appropriation and craftsmanship.

The monument should not be read as a single frozen statement. Later sultans repaired and extended it, while inscriptions and architectural fragments preserve several historical layers.

Source: UNESCO: Qutb Minar and its Monuments

Successive cities leave an unusually dense urban record

Delhi's archaeology ranges from prehistoric and late Harappan material to early historic inscriptions, medieval fortified cities and Mughal Shahjahanabad. The familiar “seven cities” is a useful convention, but it simplifies a longer and more continuous pattern of settlement.

Source: Department of Archaeology, Government of NCT Delhi — About Us

Delhi receives a National Capital Territory framework

The Constitution's sixty-ninth amendment and the 1991 government act created the National Capital Territory framework with an elected assembly and council of ministers. Delhi remains a union territory, with powers divided between its elected government and the Union under constitutional and statutory rules.

Source: India Code — Government of National Capital Territory of Delhi Act, 1991