Despite the name, Great Danes are German. They descend from boar hounds kept by German nobility, mastiff and greyhound-type crosses built to be strong and fast. Today they're among the tallest dogs, with a long head, a square frame and a short coat in fawn, brindle, blue, black, harlequin, mantle or merle. Males usually weigh 140 to 175 pounds and females 110 to 140.
Many Danes are gentle, friendly and surprisingly calm at home, often happiest leaning on their people or stretched across the sofa. Their size shapes everything, though: food, car space, careful puppy growth and the real risk of bloat and heart disease within a lifespan of roughly 7 to 10 years. Dogs vary, so a Dane's own personality matters more than the breed description.