what are the largest dog breeds
25 Of The Worldâs Largest Dog Breeds English mastiff. The English mastiff is one of the largest dog breeds in the world, especially in terms of body mass. The first mentions of these massive dogs date back to as early as the 6th century BC. During the Roman conquest of England, the loyalty and strength of mastiff impressed even Caesar. The Worldâs Largest Dogs Neapolitan Mastiff. The Neapolitan Mastiff is an estate guard dog from Italy. The breed traces its roots to the dogs of war used by the Roman Army. The breed then existed on estates and farms across Italy for the past two millennia, known as the big dog of the little man -- the extraordinary dog of the ordinary man. 10 Large Dog Breeds That Are Gentle Giants 10 Large Dog Breeds That Are Gentle Giants. Dogs such as Mastiffs and Great Danes might look intimidating, but many large and giant breeds are actually total softies. Beneath their massive bodies and, in some cases, copious fur, many are calm and gentle dogs who often just want to snuggle on the couch. Even if they are taking up most of the room on it.