The Citânia de Briteiros is a Castro culture archaeological site located in the civil parish of Briteiros São Salvador e Briteiros Santa Leocádia in the municipality of Guimarães; important for its size, "urban" form and developed architecture, it is one of the more excavated sites in northwestern Iberian Peninsula. Although primarily known as the remains of an Iron Age proto-urban hill fort (or oppidum), the excavations at the site have revealed evidence of sequential settlement, extending from the Bronze to Middle Ages.