Taxila, also known as Takshashila, flourished in the kingdom of Gandhar from 600 BC to 500 AD.
Nalanda University in modern-day Bihar was also a great university with a library that once housed 9 million books. It served as a hub of learning for scholars from all over Asia. Many Greek, Persian, and Chinese students attended classes at Nalanda. The university was destroyed in the 11th century by pillaging Muslim invaders who overran India.