Gandhāra was an ancient region in the Peshawar basin in the far north-west of the ancient Indian subcontinent, corresponding to present-day north-west Pakistan and north-east Afghanistan. The centre of the region was at the confluence of the Kabul and Swat rivers, bounded by the Sulaiman Mountains on the west and the Indus River on the east. The Safed Koh mountains separated it from the Kohat region to the south. This being the core area of Gandhara, the cultural influence of Greater Gandhara extended across the Indus river to the Taxila region and westwards into the Kabul and Bamiyan valleys in Afghanistan, and northwards up to the Karakoram range. During the Achaemenid period and Hellenistic period, its capital city was Pushkalavati (Greek: Πευκελαώτις), modern Charsadda. Later the capital city was moved to Peshawar by the Kushan emperor Kanishka the Great in about 127 AD.