Maps from ASI reports Volume1-23 of Nalanda, Shravasti, Vaishali,Bodhgaya and New Delhi

 Nalanda, Bihar

https://archive.org/details/in.ernet.dli.2015.94077/page/n127/mode/2up?q=Nalanda

Shravasti, Uttar Pradesh

https://archive.org/details/in.ernet.dli.2015.94077/page/n489/mode/2up?q=Nalanda

Vaishali, Bihar

https://archive.org/details/in.ernet.dli.2015.94077/page/n157/mode/2up?q=Patna

Qila Rai Pithora, New Delhi

Cunningham Report for the year 1871-72, ( Volume IV) Delhi, Agra by J.D. Beglar & A.C.L. Carlleyle; Archaeological Survey of India