The Gundestrup cauldron is a richly decorated silver vessel, thought to date from between 200 BC and 300 AD, or more narrowly between 150 BC and 1 BC. This places it within the late La Tène period or early Roman Iron Age. The cauldron is the largest known example of European Iron Age silver work (diameter: ; height: ). It was found dismantled, with the other pieces stacked inside the base, in 1891, in a peat bog near the hamlet of Gundestrup in the Aars parish of Himmerland, Denmark (). It is now usually on display in the National Museum of Denmark in Copenhagen, with replicas at other museums; during 2015–16, it was in the UK on a travelling exhibition called The Celts.
The cauldron is not complete, and now consists of a rounded cup-shaped bottom making up the lower part of the cauldron, usually called the base plate, above which are five interior plates and seven exterior ones; a missing eighth exterior plate would be needed to encircle the cauldron, and only two sections of a rounded rim at the top of the cauldron survive. The base plate is mostly smooth and undecorated inside and out, apart from a decorated round medallion in the centre of the interior. All the other plates are heavily decorated with repoussé work, hammered from beneath to push out the silver. Other techniques were used to add detail, and there is extensive gilding and some use of inlaid pieces of glass for the eyes of figures. Other pieces of fittings were found. Altogether the weight is just under 9 kilograms.
Despite the fact that the vessel was found in Denmark, it was probably not made there or nearby; it includes elements of Gaulish and Thracian origin in the workmanship, metallurgy, and imagery. The techniques and elements of the style of the panels relate closely to other Thracian silver, while much of the depiction, in particular of the human figures, relates to the Celts, though attempts to relate the scenes closely to Celtic mythology remain controversial. Other aspects of the iconography derive from the Near East.