Leonberger University of Bern, Bern, Switzerland In the 1830s, Heinrich Essig, a dog breeder and seller and mayor of the town of Leonberg near Stuttgart in Baden-Württemberg, Germany, claimed to have created the Leonberger by crossing a female Landseer Newfoundland with a "barry" male from the Great St. Bernard Hospice and Monastery (which would later create the Saint Bernard breed). Later, according to Essig, a Pyrenean Mountain Dog was added, resulting in very large dogs with the long, white coats that were the fashion for the time, and pleasant temperament. The first dogs registered as Leonbergers were born in 1846 and
St. Bernard (dog) the eyelid turns in or out. The breed standard indicates that this is a major fault. The breed is also susceptible to epilepsy and seizures, a heart disease called dilated cardiomyopathy, and eczema. US and UK breed clubs put the average lifespan for a St. Bernard at 8–10 years. A 2003 Danish breed survey (35 dogs) puts the median lifespan at 9.5 years while a UK breed survey in 2004 (53 dogs) puts the median lifespan at 7 years. In the UK survey about one in five lived to >10 years with the longest lived dog at 12 years and