Abstract: Bangladesh possesses a rich early heritage involving two great religions, Hinduism and Buddhism. These two beliefs, with their political patronization, developed an architectural vocabulary expressing their spiritual desire and aspiration. Later, when Muslims invaded India, they brought a different architectural approach, evident in their secular and religious structures all over the Indian subcontinent. Muslims built mosques with the use of imported features modified by local culture, climate, tradition, materials, and technology. From that period through the present, mosques in Bangladesh have developed a unique style in terms of architecture. The notion of mosque architecture has been changing over time, according to the desires of the ruling class and the common people as well. This study presents tangible evidence of the changing morphology of mosque architecture, and identifies the influencing factors that initiated the development over the ages.