Abstract:
This research work deals with multi-dimensional factors - manmade and natural- 
that acted as catalysts in the making and remaking of geo-political and cultural units in 
Bengal in six centuries (c.1200-1800 CE) using coins, epigraphs and structural remains as 
primary sources. It presents a description of the geographical features of this land to 
prepare the spatial setting- location, land formation, climate and the dynamic role in 
their formation and growth. In the pre-thirteenth century phase, the janapadas originated 
from people living here and gradually turned into political entities like Pundra-Varendra, 
Gaur, Rarh, Vanga, Samatata and Harikela. The last three entities remained out of the 
political domain of the Pala rulers (c. 764-1166 CE) and developed as separate geo
political entities. This thesis has proposed a few corrections in the political history of 
Bengal based mainly on numismatic evidence. Fresh reading of the only gold coin of 
Fakhruddin Mubarak Shah records his independent authority in Sonargaon in 734 
AH/1333 CE. This challenges all the earlier calculations of the reign period of this ruler. 
This study makes an intervention in the current historiography of Bengal and proposes 
205 (1333 to 1538 CE) years of Independent Sultanate instead of 200 (1338-1358 CE) 
years, widely accepted so far. Additionally, this study claims that Sultan Nasiruddin 
Mahmud Shah, first ruler of the Later Ilyas Shahi dynasty expressed his political 
sovereignty in the year of 832 AH/1428 CE.   
In Chapter Four it has been shown that in between thirteenth to mid-sixteenth 
century seven geo-political units grew in Bengal. Among these Lakhnauti, Pandua and 
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Gaur were the three capital cities or administrative headquarters which grew on the 
northern Pleistocene land (West Bengal, India). In this phase Sonargaon was the first 
independent political entity in the eastern and southeastern part of the delta (presently 
Bangladesh). An analysis of archaeological findings of the last four decades prove that 
Khalifatabad (Bagerhat) and Mahmudabad (Jhinaidaha) were two political units 
characterized as urban settlements inhabited by a significant number of people believing 
in Islam. These three urban settlements - Sonargaon, Khalifatabad and Mahmudabad - 
grew in the deltaic land where rivers made and unmade the human settlements in the 
fifteenth-sixteenth centuries. Following this argument this thesis suggests a revision of 
Richard M. Eaton’s proposition regarding the spread and popularity of Islam in deltaic 
land. The last chapter presents a critical analysis on the Mughal capitals in Bengal. 
Among them Jahangirnagar and Murshidabad grew by the side of two big rivers - the 
Buriganga and the Bhagirathi. In the seventeenth-eighteenth century Mughal settlements 
as well as residential areas grew and expanded on the river banks where the Mughal elites 
of the province and the incoming European communities preferred to set up their own 
residential and commercial complexes to suit mainly their commercial interest. This 
thesis presents that in the eighteenth century (1703-1797 CE) 24 edifices were 
constructed in Jahangirnagar under the Naib Nazims. Thus the current thesis has 
challenged the earlier scholarship where it was widely accepted that with the shift of the 
diwani office to Murshidabad the growth and development of the city was checked, 
population gradually thinned and the physical growth of the city staggered.  
This monograph shows that the majority of the geo-political and cultural units of 
Bengal - Gaur, Tanda, Akbarnagar, Pandua, Satgaon and Murshidabad - grew on the 
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bank of the Ganges and its tributaries - the Padma and the Bhagirathi. Khalifatabad, 
Mahmudabad, Jahangirnagar were located beside two big rivers of the Delta. This thesis 
ends with a proposal that during this period rivers became an important means of 
transportation, prosperity, power and sovereignty. They played the most vital and 
dominant role in the rise, growth and in shaping the political centres of Bengal.