Buddhism, a religion founded by Gautama Buddha, first arrived in modern-day Afghanistan through the conquests of Ashoka (r. 268–232 BCE), the third emperor of the Maurya Empire.
Among the earliest notable sites of Buddhist influence in the country is a bilingual mountainside inscription in Greek and Aramaic that dates back to 260 BCE and was found on the rocky outcrop of Chil Zena near Kandahar.
[3] The Nava Vihara monasteries, located near the ancient city of Balkh in northern Afghanistan, functioned as the centre of Buddhist activity in Central Asia for centuries.
The Mauryans brought Buddhism from India subcontinent and controlled the area south of the Hindu Kush until about 185 BC when they were overthrown.Alexander took these away from the Aryans and established settlements of his own, but Seleucus Nicator gave them to Sandrocottus (Chandragupta), upon terms of intermarriage and of receiving in exchange 500 elephants.
Nava Vihara's hereditary administrators, the Persian Barmakids, converted from Buddhism to Islam after the monastery's conquest and became powerful viziers under the Abbasid caliphs of Baghdad.
Manuscripts and fragments that have survived from this monastery's collection include the following source texts:[9] In August 2010, it was reported that approximately 42 Buddhist relics have been discovered in Mes Aynak of the Logar Province in Afghanistan, which is south of Kabul.