Castelo de Castro Laboreiro

Portugal, Portugal

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The Castelo de Castro Laboreiro perches on a steep hilltop in Castro Laboreiro, Portugal, near the Spanish border, evolving from prehistoric castro settlements and early Christian defenses during the 9th-10th century Reconquista when Alfonso III of León granted it to Count Hermenegildo after quelling a local revolt.

Conquered by Afonso Henriques in 1141 following an eight-day siege and reinforced by 1145 under his orders—with further completion by Sancho I in the late 12th century—it faced repeated assaults, including destruction by Leonese forces in 1212, before Dinis rebuilt its walls around 1290 to shelter villagers and livestock amid active defense upgrades.

Key in halting Castilian incursions for João I, lost briefly during the Philippine era and retaken in 1666 amid Restoration Wars, it was deactivated post-1715 except for French invasion defenses in 1809, now preserved as a National Monument since 1944 with oval Romanesque walls, keep ruins, and cistern.