The main site of the Indus Valley Civilization in Punjab was the city of Harrapa. The Indus Valley Civilization spanned much of what is today Pakistan and eventually evolved into Indo-Aryan civilization. The arrival of the Indo-Aryans led to the flourishing of the Vedic Civilization along the length of the Indus River. This civilization shaped subsequent cultures in South Asia and Afghanistan. Although the archaeological site at Harappa was partially damaged in 1857 when engineers constructing the Lahore-Multan railroad used brick from the Harappa ruins for track ballast, an abundance of artifacts have nevertheless been found. Punjab was part of the great ancient empires including the Gandhara Mahajanapadas, Mauryas, Kushans and Hindu Shahi. Agriculture flourished and trading cities (such as Multan and Lahore) grew in wealth.
Due to its location, the Punjab region came under constant attack and influence from the west. Invaded by the Persians, Greeks, Kushans, Scythians, Turks, and Afghans, Punjab witnessed centuries of bitter bloodshed. Its legacy is a unique culture that combines Zorastrian, Hindu, Buddhist, Persian, Central Asian, Islamic, Afghan, Sikh, and British elements. The city of Taxila, founded by son of Taksh the son Bharat who was the brother of Ram. It was reputed to house the oldest university in the world, Takshashila University, one of the teachers was the great Vedic thinker and politician Chanakya. Taxila was a great centre of learning and intellectual discussion during the Maurya Empire. It is a UN World Heritage site, and revered for its archaeological and religious history
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