Nalanda which was founded in the 5th century AD, is famous as the ancient seat of learning and has the ruins of the worlds most ancient university lies here.
Some buildings were constructed by the Mauryan emperor Ashoka the Great. The Gupta Empire also patronized some monasteries.
Wikipedia: http://en.wikipedia.org/wiki/Nalanda
Shunya Website on Nalanda: http://www.shunya.net/Pictures/NorthIndia/Nalanda/Nalanda.htm
Web : http://bstdc.bih.nic.in/Nalanda.htm