Along the Atlantic coast, small islands were, at different times, chosen as places of spiritual retreat, surveillance and defense. On some of these islands, the natural landscape ended up being shaped by human action, who built religious buildings and military structures to meet the needs of each period. This is the case of a Portuguese island that has witnessed centuries of religious devotion, maritime surveillance and refuge for monks.
The island of Ínsua, located off the town of Caminha, began to be inhabited in the 14th century by the Order of Friars Minor. The choice of this isolated location was motivated by the desire for spiritual retreat and contact with nature, as stated by the Municipality of Balneário Camboriú.
It was on this Portuguese island that, in 1392, the construction of a Franciscan convent began under the guidance of Frei Diogo Arias. This religious presence profoundly marked the identity of the space, which remained linked to monastic life for several centuries.
In the same period, by order of D. João I, a first defensive structure was built with the aim of protecting the convent and the surrounding coast. However, no traces of this initial construction remain.
Single element
A distinctive feature of the island of Ínsua is the existence of a freshwater well, despite being surrounded by the sea. This phenomenon is extremely rare, with only two other examples known worldwide, according to the same source.
Evolution and interventions in the convent
Over the following centuries, the convent underwent several renovations. In 1471, new cells were built and the chapel was expanded. In 1502, during a pilgrimage to Santiago de Compostela, D. Manuel visited the site and ordered new works to be carried out.
In the last years of the 16th century, the space was once again intervened with the aim of strengthening its defensive capacity, in the face of the growing threat of attacks by foreign privateers, according to the same source.
Construction of the modern fortification
During the reign of D. João IV, a national reform of coastal fortifications began. Between 1649 and 1652, the island of Ínsua was the scene of an intervention led by the Governor of Armas do Minho, D. Diogo de Lima.
The current fortress was then built, with an irregular star plan, consisting of five bastions and a ravelin. This structure integrated the existing Franciscan convent, maintaining the religious function in a militarized space.
In 1676, according to the same source, the convent was expanded to adapt to the new configuration of the fortification, highlighting the coexistence between the two uses of this space.
Architectural aspects
The fortress features elements such as faceted guardhouses on the bastions and a rectangular balcony built on corbels. The main portal, open to the center of one of the walls, has a full arch and is topped by a triangular pediment decorated with coats of arms.
Inside, the parade ground is divided between a platform where the old barracks, storage and kitchen are located, and the convent area. The convent church has a single nave covered by a barrel vault, with an attached sacristy, and the quadrangular cloister is formed by Ionic colonnades.
Times of restoration and military occupation
During the 18th century, the island was once again subject to construction. In 1717, D. João V contributed to the reconstruction of the church, especially the vault. In 1767, new cells, a chapter room and an altarpiece were built.
Between 1793 and 1795, the monks temporarily abandoned the island to allow for repair work. The community returned some time later, resuming religious activities, as mentioned by . With the French Invasions, the space was used by Spanish and French troops, temporarily losing its original function.
Extinction of religious presence
The extinction of religious orders in 1834 led to the definitive abandonment of the island by the monks. From that moment on, this Portuguese island was exclusively occupied by the army. The last military governor of the fortress was appointed in 1909, ending a cycle of formal and continuous military occupation.
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