In this paper, we are proposing a georeferencing of "Roberti Grosseteste Epistolae", that is, of the Letters written by Robert Grosseteste, one of the most prominent thinkers of the Thirteenth Century, Bishop of Lincoln from 1235 AD till his death, on 9 October 1253. The georeferencing is evidencing the network of the thinker, in particular, his links with other episcopal seats in England. The map we obtain on Google Earth shows the large influence of Grosseteste on his geographic area and political environment.