What two breeds make a Rottweiler?

The two breeds that make a Rottweiler are Mastiffs and Sheepdogs. The Rottweiler’s lineage traces back to the Mastiff-like dogs that served as cattle herders for the ancient Romans during their campaigns in Europe. When some of these dogs remained in Germany after the Roman armies departed, they interbred with local Sheepdogs, resulting in the development of the Rottweiler breed.