Explanation: Taxila:

• Takshashila or Taxila is situated in presentday Pakistan. Between the fifth century and fourth century BCE, it was part of the Achaemenid Empire of Persia.
• Because of its strategic location on the trade route between the East and the West, it emerged as an important centre of learning and culture.
• Students came from far and wide to Taxila in search of knowledge. The city was brought to light by the excavation carried out in the 1940s by Sir John Marshall. Taxila is considered “one of the greatest intellectual achievements of any ancient civilization”.
• Panini seems to have compiled his wellknown work, Ashtadhyayi, here.

Source: Tamil Nadu Board Class 11