What dogs did people breed to get the alpine mastiff?

The Alpine Mastiff is believed to have been bred from a combination of ancient large Dog Breeds, primarily the Molosser dogs, which include the Tibetan Mastiff and the Italian Mastiff, among others. These breeds were selected for their strength, size, and protective instincts, suitable for guarding livestock and property in mountainous regions. Over time, selective breeding aimed to enhance these traits, leading to the development of the Alpine Mastiff as a distinct breed.