Another one I did not know.

The Akbash dog is a native of Turkey. These dogs are striking, white flock guards that have made a name for themselves on American farms and ranches.   They are used to guard livestock from grizzly bears, black bears, wolves and coyotes. Akbash dogs stand 32" at the shoulders and can weigh 120 lbs. and up. Their white colour distinguishes them from predators.
This breed was developed at least 3,000 years ago in the Mediterranean basin.  Akbash means "white head" in Turkish.