▁age ▁of ▁ 8 8 , ▁r uling ▁the ▁bulk ▁of ▁this ▁ 1 0 0 - year ▁dynast y . ▁The ▁N andas ▁were ▁followed ▁by ▁the ▁Ma ury a ▁dynast y . ▁ ▁The ▁Ma ury as ▁▁ ▁With ▁the ▁rise ▁of ▁the ▁Ma ury an ▁emp ire ▁( 3 2 1 ▁BC - 1 8 5   B CE ), ▁Pat na , ▁then ▁called ▁P atal i put ra ▁became ▁the ▁seat ▁of ▁power ▁and ▁n erve ▁center ▁of ▁the ▁Indian ▁sub cont inent . ▁From ▁P atal i put ra , ▁the ▁f amed ▁em peror ▁Ch and rag upt a ▁ruled ▁a ▁vast ▁emp ire , ▁stretch ing ▁from ▁the ▁Bay ▁of ▁Beng al ▁to ▁Afghan istan . ▁Ch and rag upt a ▁established ▁a ▁strong ▁central ized ▁state ▁with ▁a ▁complex ▁administration ▁under ▁the ▁tut el age ▁of ▁K aut ily a . ▁ ▁Early ▁Ma ury an ▁P atal i put ra ▁was ▁mostly ▁built ▁with ▁wooden ▁structures . ▁The ▁wooden ▁buildings ▁and ▁pal aces ▁rose ▁to ▁several ▁stories ▁and ▁were ▁surrounded ▁by ▁par ks ▁and ▁p onds . ▁Another ▁distinct ive ▁feature ▁of ▁the ▁city ▁was ▁the ▁d rain age ▁system . ▁Water ▁course ▁from ▁every ▁street ▁dra ined ▁into ▁a ▁mo at ▁which ▁function ed ▁both ▁as ▁defence ▁as ▁well ▁as ▁se w age ▁dispos al . ▁According ▁to ▁Meg as then es , ▁P atal i put ra ▁of ▁the ▁period ▁of ▁Ch and rag upt a , ▁was ▁" s urr