How old is the city of Taxila?

Extract

The city of Taxila, more properly Takṣaśilā, was one of the most important in ancient India. It is frequently mentioned as one of the two great cities of Gandhara (approximately the North West Frontier Province of Pakistan), along with its neighbour Puṣkalāvatī (modem Charsada north of Peshawar) some 80 miles (130 km) to the west. It was first identified in modern times by Major General Sir Alexander Cunningham in 1863, after he had visited the extensive series of mounds lying near the village of Shah Dheri, east of Hasan Abdul, in the Punjab province of Pakistan (Cunningham, 1871). His identification was soon confirmed by the discovery there of early inscriptions referring to Taxila by name.