The Bernese Mountain Dog is a large dog breed from Bern, Switzerland and the Swiss Alps, being one of the four breeds of Sennenhund-type dogs, with roots in the Roman mastiffs. The name Berner refers to the breed's area of origin in the canton of Bern, and Sennenhund is derived from the German Senne and Hund ("hound/dog"), as they accompanied the alpine herders and dairymen called Senn. This breed was originally kept as a general farm dog and large Sennenhunde in the past were also used as draft animals pulling carts. The breed was officially established in 1912.

Sennenhunds, called Swiss mountain dogs or Swiss cattle dogs in English, are a type of dog originating in the Swiss Alps. The Sennenhund are farm dogs of the general livestock guardian type. There are four breeds of Sennenhunds, all sporting a unique tricolor coat. While the two larger ones share a heavy build and a calm temperament, the two smaller ones are more agile. The breeds range from medium in size to very large. The name Sennenhund refers to people called Senn or Senner, Swiss Alpine herdsmen and dairymen, and does not translate as "mountain" or "cattle".