Castle of Pena de Aguiar

The Castle of Pena de Aguiar, in the municipality of Vila Pouca de Aguiar, Portugal, began as a Roman military fort built in the first century BCE.

The Roman fort was established to overlook the road between Aquas Flavias (Chaves) and Lamecum (Lamego), a route linked to regional exploitation of gold, silver and lead. After the end of Roman administration, the region saw successive occupation by Visigothic and later Muslim groups up to the eighth century.

Following the Christian Reconquest, eleventh-century efforts by the Kings of León reworked the former Visigothic administrative centre. Troops of Ferdinand I of León are recorded as taking the place, and the reestablishment of countships in the area led to the creation of fortified residences on the old administrative footprint.

A new medieval castle arose between the early twelfth century and the thirteenth, probably finished during the reign of King Sancho I. During the twelfth century it sheltered partisans of Afonso Henriques, and the site appears in the hagiography of Santa Senhorinha de Basto. Leonese forces besieged the castle in an effort to subdue or capture supporters of Afonso Henriques, and D. Gonçalo Mendes de Sousa, master of the dominions of Aguiar and Panóis, came to relieve the defenders.

On 10 July 1255 the settlement of Telões was granted a charter under King Afonso III. After 1258 the local population gradually reduced its upkeep of the defensive line. At the end of the fourteenth century work was completed on the barbican and on an embrasure hall, recorded as repair or consolidation activities.

By the start of the sixteenth century the village lost administrative prominence and, in 1515, its affairs were incorporated into the foral connected with Aguiar da Pena. Alcaldes recorded for the place include Diogo Lopes de Azevedo, Fernão Martins de Souza (from 17 July 1534), João de Souza Guedes, and Jerónimo de Souza Machado (1583–1594). The castle structure itself was abandoned in 1527, a change attributed to the evolving nature of warfare based on gunpowder.

National reports noted the fragility of northern defenses during the later centuries. A report dated 28 December 1804 recorded the Province of Trás-os-Montes as unprotected during the Spanish invasion of 1762, when Chaves, Bragança and Miranda were assaulted and regional castles came under attack. A circular of 23 September 1861 reiterated concerns about the northern defences.

The site was classified as a Monumento Nacional on 26 February 1982. Archaeological interventions took place between 1982 and 1984, which also investigated prehistoric foundations. A restoration and recovery programme funded around €175,000 led to re-inauguration on 21 July 2001. As part of that programme a ruined house adjoining the castle was acquired to serve as an interpretative centre, and subsequent work consolidated dependencies, repaired walls and installed railings and metal walkways to integrate the site with nearby Roman mines and the Panóis rock-art sanctuary.