Sé Velha de Coimbra (Old Cathedral of Coimbra)

The Sé Velha (Old Cathedral) of Coimbra, begun around 1139 under the reign of Portugal's first king, Afonso Henriques, is one of the best-preserved Romanesque cathedrals in Portugal and was built partly as a fortress church during the wars of the Christian Reconquest. Its thick granite walls, crenellated parapet, and narrow slit windows reflect its dual role as a place of worship and a defensible stronghold in a still-contested frontier region. Inside, the cathedral preserves a Gothic gilded altarpiece from the 16th century, Moorish-influenced horseshoe arches in the Porta Especiosa doorway, and a cloister added in the 13th century that is among the earliest Gothic cloisters in Portugal. The building's interior is organized around a single main nave with the original Romanesque ribbed vaulting still visible in parts, and side chapels added over subsequent centuries in Manueline and Renaissance styles. Restoration campaigns through the 19th and 20th centuries stripped later Baroque additions in places to expose the medieval stonework, and the cathedral today functions as an active parish church as well as a heritage monument within Coimbra's UNESCO-listed university city.