History of São Jorge Castle — Visigoths, Moors, and Reconquest

The hill that became a fortress

The São Jorge hill has been fortified since at least the Iron Age; its commanding position over the Tagus made it a prize for successive peoples.

Timeline (abridged)

• Pre-Roman / Roman: Early settlement and lookout functions.
• Visigothic era: Fortifications consolidated into an acropolis.
• Moorish period (8th–12th c.): Major expansion — the castle as a taifa stronghold.
• 1147 Reconquest: A turning point — Afonso Henriques and crusader allies captured Lisbon, integrating the castle into the Portuguese realm.

The reconquest reshaped urban life — the castle's role moved from purely military to symbolic center of royal power.

Archaeology & evidence

• Foundations reveal Roman and medieval layers — pottery, coins, and mason marks.
• Stonework typology helps archaeologists date phases (ashlar vs rubble cores).

Read more

If you want primary-source translations, check the municipal museum catalogue or the castle's archaeological summaries in academic journals.