Created during the middle of the 19th Century, the Leonberger is a massive dog that greatly resembles its ancestor: the ST. Bernard, but also exhibits a great deal of features from its other lines of the Newfoundland and Great Pyrenees. Much like the prefix of the breed’s name, the dog was bred with the lion in mind, and the dog’s adult sizes of 170 pounds and 31 inches tall give it an authentic size and build that really does signify the lion. This German dog breed was very popular during the decades before World War II. Unfortunately, after the war was over, it is believed that there were only a small handful that survived. Because of its immense size, the Leonberger lives to a maximum of 9 years, and it can have several issues with its bones and joints with the hips being of particular concern.