The contour of Pataliputra, present day Patna, was redrawn for centuries with the invasion of Magadha's, Maurya's, Sunga's, Gupta's, Pala's etc. The maps below illustrate the stretch of their rule and Patna under different kingdoms.
Pataliputra as the capital of Magadha Dynasty
Pataliputra under the Maurya's reign
Pataliputra as the capital of Sunga Empire
The map of Pataliputra under the Pala's administration