Statistics for occurrence #1 of “Ravenna” in book 1, chapter 4 of Vitruvius Pollio, The Ten Books on Architecture:

..., while any that swim down from the higher levels to the shore are killed at once by the saltness to which they are unused. An instance of this may be found in the Gallic marshes surrounding Altino, Ravenna , Aquileia, and other towns in places of the kind, close by marshes. They are marvellously healthy, for the reasons which I have given. 12. But marshes that are stagnant and have no outlets either by ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Ravenna (Italy) 38 6 0 0 0 user votes
Ravenna (Italy) 3 0 1 0 0 user votes
Ravenna (California, United States) 0 0 0 0 0 user votes
Ravenna (Italy) 0 0 0 0 0 user votes
Ravenna (Kentucky, United States) 0 0 0 0 0 user votes
Ravenna (Michigan, United States) 0 0 0 0 0 user votes
Ravenna (Montana, United States) 0 0 0 0 0 user votes
Ravenna (Nebraska, United States) 0 0 0 0 0 user votes
Ravenna (Texas, United States) 0 0 0 0 0 user votes
Ravenna (Washington, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.