Dubris or Portus Dubris was a town in Roman Britain. It is now Dover, Kent, England.
As the closest point to continental Europe and the site of the estuary of the Dour, the site chosen for Dover was ideal for a cross-channel port. (The Dour is now covered over for much of its course through the town.) In the Roman era, it grew into an important military, mercantile and cross-channel harbour and - with Rutupiae - one of the two starting points of the road later known as Watling Street. It was fortified and garrisoned initially by the Classis Britannica, and later by troops based in a Saxon Shore Fort.
Read more about Dubris: Caesar, Classis Britannica Fort, Lighthouses, Peak, Roman Painted House, Saxon Shore Fort, Visible Remains