Patna is an ancient town. This town has witnessed many vicissitudes in its historical past and after a long struggle and evolution has formed the present shape. This town was known as different name in different era. In the time of 1951 census, there were 74 class I town in India, Patna was also in class I town. The urban population of Patna was increased in different census year due to infrastructure & amenities and its capital town characteristics. The horizontal & vertical expansion was shown in this town. In 1971, the area of different blocks were included in Patna town and known as Patna agglomeration. Master plan 2031, the area of different adjacent blocks will include with Patna agglomeration for development of Patna metropolitan town. The concept of Smart City was also introduced for the development of Patna town. In this concept, beautification of town, proper drainage planning, expansion of road etc. will be included.