Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Frontiers of the Roman Empire' has mentioned 'Estuary' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| The control and surveillance of the waters of the North Sea, the Rhine estuary and the Lower Rhine was the responsibility of the Classis Germanica whose headquarters was in Colonia Claudia Ara Agrippinensium/Cologne. | WIKI |