1. The Emergence of Delhi as a Commercial Capital
Delhi did not serve as an imperial capital in early ancient Indian history. It first emerged as the political headquarters of a kingdom in the twelfth century under the Tomara Rajputs. In the mid-twelfth century, the Tomaras were vanquished by the Chahamanas (also referred to as the Chauhans) of Ajmer. Under the unified commercial hegemony of the Tomaras and Chauhans, Delhi underwent rapid urbanization and evolved into a vibrant commercial hub of northern India.
Prosperous Jaina merchants settled in substantial numbers throughout the city, financing the erection of monumental temples and directing inter-regional commercial networks. Coins minted in the city, known across the subcontinent as dehliwal, circulated extensively as standard currency. The decisive transformation of Delhi into an imperial capital commanding vast tracts of the subcontinent commenced with the foundation of the Delhi Sultanate in 1206 CE, following the campaigns of Muhammad Ghori and his general Qutbuddin Aybak.
2. The Five Dynasties of the Delhi Sultanate (1206–1526 CE)
Over more than three centuries, five distinct ruling dynasties governed from Delhi, transforming the urban landscape into a succession of fortified imperial cities (such as Dehli-i Kuhna, Siri, Tughluqabad, and Jahanpanah):
- The Early Turkish Rulers / Mamluk (Slave) Dynasty (1206–1290 CE): Established by Qutbuddin Aybak (1206–1210 CE), followed by Shamsuddin Iltutmish (1210–1236 CE), his daughter Raziyya (1236–1240 CE), and Ghiyasuddin Balban (1266–1287 CE), who consolidated centralized authoritarian rule.
- The Khalji Dynasty (1290–1320 CE): Founded by Jalaluddin Khalji, but propelled to imperial prominence by Alauddin Khalji (1296–1316 CE), who executed deep southern campaigns, instituted rigorous agrarian land audits, and imposed strict market price controls.
- The Tughluq Dynasty (1320–1414 CE): Initiated by Ghiyasuddin Tughluq, followed by the ambitious visionary Muhammad Tughluq (1324–1351 CE), known for bold administrative innovations, and Firuz Shah Tughluq (1351–1388 CE), who concentrated on welfare infrastructure, canals, and urban foundations.
- The Sayyid Dynasty (1414–1451 CE): Founded by Khizr Khan following the catastrophic invasion of Delhi by Timur in 1398 CE.
- The Lodi Dynasty (1451–1526 CE): The first Afghan ruling house of Delhi, established by Bahlul Lodi and continued by Sikandar Lodi, ending with Ibrahim Lodi's defeat by Babur at the First Battle of Panipat in 1526 CE.
This dynamic succession established centralized bureaucratic institutions, introduced Persian administrative norms, and integrated northern India into wider Islamic commercial and cultural circuits.