Excavations
Archaeological Survey of India (ASI) carried out excavations at Purana Qila in 1954–55 and again from 1969 to 1973 by B. B. Lal, and its findings and artefacts are exhibited at the Archaeological Museum, Purana Qila. This includes Painted Grey Ware, dating 1000 BC, and various objects and pottery signifying continuous habitation from Mauryan to Sunga, Kushana, Gupta, Rajput, Delhi Sultanate and Mughal periods.
Read more about this topic: Purana Qila, Delhi