Here are 7 clues:
It is a working dog.
Selective breeding has occurred in the Netherlands, Germany and Switzerland. This sets these dogs apart from their Canadian forebears.
Great swimmers and known for water rescue.
Character: Calm nature, affable personality, intelligent. easy to train, gentle, and love children of all ages.
Shed copiously twice yearly and drool moderately.
Likely related to the St. Bernard, the English Mastiff and the Great Pyrenees.
Largely sedentary dogs that love hanging out with the family. Happiest when provided with the opportunity to swim.
Answer: The dog is a Landseer.
Artwork: Renoir, Madame Georges Charpentier and Her Children, Georgette-Berthe and Paul-Émile-Charles, 1878. Collection: MET.