Delhi, India's national capital territory, spans approximately 1,483 km² with a population approaching 23 million, making its urban agglomeration the world's second most populous after Tokyo. The city, which has seen successive imperial capitals known as the "seven cities of Delhi," is home to the Qutb Minar complex, an ensemble of Indo-Islamic monuments inscribed on the UNESCO World Heritage List and dominated by a 72.5-meter red sandstone minaret begun in 1192 by Delhi's first sultan. New Delhi, designed by the British in the early twentieth century, forms its administrative core. Capital of independent India since 1947, the city combines Mughal remains, colonial heritage, and a rapidly expanding metropolis.
