Neapolitan Mastiff - The massive, solid Neapolitan Mastiff is an imposing hulk of a dog, and it's meant to be. A writer during the days of the Roman Empire described the ideal guard dog for the house as visible during daylight hours and able to fade into the shadows at night to attack without being seen.
Facts You Never Knew Neapolitan Mastiff This is an ancient Italian breed is a powerful deep-chested smooth-coated dog used chiefly as a watchdog and guard dog. Description from pinterest.com. I searched for this on bing.com/images