What kind of dog is a Rotweiler?

The breed is an ancient one, whose history stretches back to the Roman Empire. In those times, the legions traveled with their meat on the hoof and required the assistance of working dogs to herd the cattle. One route the army traveled was through Württenberg and on to the small market town of Rottweil. The principal ancestors of the first Rottweilers during this time was supposed to be the Roman droving dog, local dogs the army met on its travels, and dogs with molesser appearance coming from England and The Netherlands.