The Po-lu-shah of the Chinese, Pushapura of the Persians and the Peshawar of the Mughal rulers The present capital of Khyber Pukhtunkhawa was the second capital under the Kushans from 1st to 5th Century AD. It is the oldest living city in this part of ASIA Here once stood Asia's biggest and most famous Stupa of Kanishka at Shahji ki Dheri near the walled city's Gunj Gate.