The term 'seven cities of Delhi' refers to the historical evolution of Delhi, from the 10th Century onwards, where successive rulers built new cities, each adding to the location's rich past. These cities, though distinct, are considered to have merged into modern-day Delhi. The seven cities are Lao Kot (Quila Rai Pithora), Siri, Tughlaqabad, Jahanpanah, Firozabad, Shergarh (Purana Quila) and Shahjahanabad. To this was added British New Delhi, followed by modern day post-Independence construction.