Mentioned by Pliny the Elder and by a local epigraphic source, the 2nd Century AD Ponte de Alcântara inscription, near Cáceres, along with the other Lusitani tribes, their ethnic and Linguistic affiliation has not yet been fully determined. It has been suggested that the Paesuri were of Thracian origin, though to what extent they were "celticized" by their neighbors, the Lusitani, Gallaeci and Turduli Veteres, remains unclear.
Located between the rivers Douro and Vágia (Vouga), in the modern northern central Portugal, the Paesuri comprised four subtribes – Ireucoutiori, Aravoni, Seareas and Paisicaicoi – which settled the mountains of Freita, Arada, and the northern slopes of Caramulo around the 5th Century BC.
Like their neighbours the Turduli Veteres and Gallaeci, the Paesuri did not fell under Carthaginian rule at the later 3rd Century BC and appear to have not taken part in the 2nd Punic War. It is still not clear if they played any significant role in the Lusitanian Wars of the 2nd century BC. Allied with the Lusitani, they bore the brunt of the first Roman thrusts into the Iberian northwest. In 138-136 BC Consul Decimus Junius Brutus certainly devastated their lands during his punitive campaign against the Lusitani and the Turduli Veteres. Again the Paesuri suffered the same treatment in 61-60 BC, when they were forcibly incorporated into Hispania Ulterior province by the Propraetor Julius Caesar.
- Pliny the Elder, Naturalis Historia, IV, 113.
- CIL II 760: Municipia / provinciae / Lusitaniae stipe / conlata quae opus / pontis perfecerunt / Igaetani / Lancienses Oppidani / Talori / Interannienses / Colarni / Lancienses Transcudani / Aravi / Meidubrigenses / Arabrigenses / Banienses / Paesures.
- Ferreira do Amaral, Povos Antigos em Portugal… (1997), p. 141.
- Appian, Iberiké, 73.
- Cassius Dio, Romaïké istoría, 37, 52-55.
- Alarcão, Jorge de, O Domínio Romano em Portugal, Publicações Europa-América, Lisboa (1988) ISBN 972-1-02627-1
- Alarcão, Jorge de et alii, De Ulisses a Viriato – O primeiro milénio a.C., Museu Nacional de Arqueologia, Instituto Português de Museus, Lisboa (1996) ISBN 972-8137-39-7
- Amaral, João Ferreira do & Amaral, Augusto Ferreira do, Povos Antigos em Portugal – paleontologia do território hoje Português, Quetzal Editores, Lisboa (1997) ISBN 972-564-224-4