The Jennings Dog (also known as The Duncombe Dog or The Dog of Alcibiades) is a Roman sculpture of a dog with a docked tail. It is named after its first modern owner Henry Constantine Jennings. It is a 2nd-century AD Roman copy of a Hellenistic bronze original. The original was probably of the 2nd century BC. It is 1.05 metres (3 ft 5 in) high; its leonine muzzle and one leg have been repaired since its rediscovery. Though it is one of only a few animal sculptures surviving from antiquity, a pair of similar marble mastiffs of the same model can be seen in the Belvedere Court of the Vatican Museums.