The group of 410 attic pots from Cancho Roano palace-sanctuary (Zalamea de la Serena, Badajoz) is considered one of the most important collections of the 5th century BC ever published in the Iberian Peninsula. With 360 examples, the best represented pots are those belonging to the stemless inset-lip type. They show a wide variety in typology and macroscopical features, which suggests the existence of materials from different production centres. Because of this, an archaeometric study by means of X-Ray Fluorescence and X-Ray Diffraction analyses has been conducted in order to investigate their provenance and technology. The characterised material, which includes 60 examples, is the biggest one ever published for the 5th century BC in the Mediterranean basin. The results suggest an Attic origin, while the important differences in their macroscopic and typological features are due to technological factors