This is one of my Mom's dogs, her name is Saga and she is a Broholmer, it is an old Danish breed - and she is amazing!
A bit of history on the Broholmer breed: The Danish Broholmer originated in Denmark. As a type this breed has been known since the Middle Ages, when it was used for hunting (stag-hunting). Later on it was used mainly as a guard dog for large farms and manors. At the end of the18th century these dogs were breeding pure and increased in number thanks to the royal game keeper Sehested of Broholm, from where the breed has inherited its name. After the Second World War the breed almost became extinct, but around 1975 a group of committed people organized a group called "The Society for Reconstruction of the Broholmer Breed". They were supported by the Danish Kennel Club and began the work of reviving the breed.