The origins of the Estrela Mountain Dog come from the mountains of Serra da Estrela in what is now known as Portugal. While the exact origins of this breed are unknown, it is undisputed that the Estrela Mountain Dog is one of the most ancient breeds in Portugal that still exists.
The Estrela Mountain Dog developed over a period of several hundred years, however, the first published breed standard was written in 1922 and the first official breed standard was written in 1933. Until 1972, there is no written record of this breed existing outside of Portugal and it was not imported into the United States until 1998.
To this day, the Estrela Mountain Dog remains true to its guardian heritage. It is still a working dog, guarding flocks in its native Portugal and elsewhere. The Portuguese also use it as a police dog. In the home, it is an ideal family pet because of its alertness, loyalty, intelligence, and its instinct to nurture young, all features it needed in its earliest days.