A territory virtually untouched by archaeological excavations, very few pre-Columbian artefacts from this culture exist, either on the market or in museums. Only the Barbier-Mueller collection, today scattered, offered quite a good set of terracotta with geometric motifs which was discovered almost exclusively on the island of Marajo in the north of the country. Great funeral urns, anthropo-zoomorphic semi-relief plates and cups and ritual briefs or tangas are the principal works known from this enormous territory.