Located in Southern California, Marcus Curtis has established a worldwide recognized name breeding Neapolitan Mastiffs since 1999 and The American Molossus since 2014. Marcus Curtis is the creator and owner of the Old World Mastinos line, owner of "THE DON" US Champion Old World Don Vito, 1 of the most sought after Neapolitan Mastiffs in the world. "THE DON" is the ideal extreme Neapolitan Mastiff and The foundation for The American Molossus.If you are looking for an exceptional Neapolitan Mastiff or American Molossus in every way, there is none better than Old World Mastinos. If you want the best, come to the Source! Marcus Curtis, Old World Mastinos and the creators of the Original American Molossus.