Bangladesh is a country considerably rich in archaeological wealth, especially of the medieval period both during the Muslim and pre-Muslim rules, though most of it is still unexplored and unknown. In archaeological fieldwork and research this area was very much neglected for a long time for various reasons, not the least of which are its difficult geography and climate and remoteness from the main centres of the subcontinent. With the independence of Bangladesh in 1971 the Government has undertaken a number of field projects including a comprehensive survey and exploration of the hitherto unexplored areas and a fairly ambitious scheme of excavations on selected sites. Though work at present is carried out on a limited scale, the discoveries already made have been significant. while new information and fresh evidence are coming out gradually. These fresh explorations are likely to add substantially to our knowledge of the history and chronology of ancient Bangladesh and various aspects of her life and culture. The earlier history of Bangladesh reveals that Buddhism received royal patronage from some important ruling dynasties like the great Pala rulers. the Chandras and the Deva Kings. Under their royal patronage numerous well-organized, self-contained monasteries sprang up all over the country.