Breed History & Job Description: What do many of the big, powerful breeds have in common? They are descended from the Mastiff-type dogs that first appeared in Asia. The Rottweiler originated from the German town of Rottweil, where they were used as butchers’ dogs. The Rottweiler’s ancestors were thought to have originated with the Ancient Romans, who brought the dogs with them when they traveled across Europe, using them to guide cattle, and the Romans’ food supply on the road, and guard encampments.