Meet the newest dog breed recognized by the American Kennel Club—and see the rest of the 10 most recently recognized breeds

2004: Neapolitan mastiff

Don’t be startled by the Neapolitan mastiff and its formidable size, whereas the droopy-chinned purebred is tremendously sweet and loyal—at least to its owners. Once known as the “big dog of the little man,” this massive canine descends from Roman dogs of war, though some have claimed the breed was brought to Greece around 300 B.C. by Alexander the Great himself.