"terracotta was a significant part of bengal ancient time"-explaion
Read, read, read, and take good notes. Let us know what you decide.
http://www.google.com/search?q=terracota+ancient+bengal&oq=terracota+ancient+bengal&aqs=chrome..69i57.5863j0j7&sourceid=chrome&espv=210&es_sm=119&ie=UTF-8