Ratae became the Civitate for the Corieltavi.
http://roman-britain.co.uk/places/ratae.htm
http://romanleicester.dmu.ac.uk/index.html
https://en.wikipedia.org/wiki/Ratae_Corieltauvorum
https://www.google.com/maps/d/viewer?hl=en_US&mid=16jwrm1HdK2_Teff9roj6kuxF5eg
http://www2.rgzm.de/transformation/unitedKingdom/Towns/Pic21.htm