The Nizamuddin area is today recognized as one of the densest ensemble’s of medieval Islamic buildings anywhere in India. Almost every dynasty to have ruled Delhi has built here; the Il Bari Turks (also known as the Slave dynasty), the Khaljis, the Tughlaqs, the Lodis, the Surs and, of course, the Mughals built some of the +inest buildings of their reigns in this small geographical area that stood along the River Yamuna, until the river receded eastwards in the nineteenth century.

Source

From Hazrat Nizamuddin Basti in Heritage of the Mughal World (Philip Jodidio, editor)