3D model of the rear surface of the surviving fragments showing the welding zones in red, and in the foreground, the metal reservoir in the form of a basin where the welding metal was poured in. Great Dolphins of Vienne, Roman period, Vienne, France, 2nd century CE, max L. 260 cm (Musée des Beaux-Arts et d’Archéologie de Vienne, France, inv. R.1998.2.43).