The Romans supplied the base dog used in the eventual development of the Rottweiler. The rest of the dogs crossed with the original Roman dog were from Germany, hence my statement that Rottweilers were "developed" by the Germans, not the Romans. I have a feeling that we are discussing semantics here and none of it answers the original question, so I'm going to drop it.
[This message has been edited by CarolineS (edited September 18, 1999).]