Wikipedia
Ain-i-Akbari
The Ain-i-Akbari or the "Constitution of Akbar", is a 16th-century, detailed document recording the administration of emperor Akbar's empire, written by his vizier, Abu'l-Fazl ibn Mubarak. It makes the Volume III and the final part of the much larger document, the Akbarnama , the Book of Akbar, also by Abul Fazl, and it itself is in three volumes.
It is currently housed in the Hazarduari Palace, in West Bengal.