The Chapel of Saint Samson was built in two phases, between 1575 and 1631.
It is the main element of a complex, combining the manor house (to the south), which was once accessed, the fountain (to the northwest), the entrance gate (to the northeast), and the Christianized menhir (moved to the foot of the porch).
The first phase, completed in 1575 (a date previously visible on a buttress of the gable), concerns the chapel itself (without the tower), a small Flamboyant Gothic building with a superb ornate door to the south (then the only access point to the interior of the building) and an apse intended to later house a painted stained-glass window. This foundation is believed to have been initiated by the lord who owned the Barac'h-Keruzec fief, who endowed this isolated territory with a Christian building, providing a rhythm for the peasants' lives.
A second phase, completed in 1610 (date visible on a window), concerns the construction of a western massif, with an entrance porch and a bell tower composed of a square tower flanked by a spiral staircase turret, surmounted by a dome. This achievement is inspired by the Beaumanoir style, developed during the previous century in the lower Trégor, from Morlaix to Lannion, very appreciated for its elegance and characterized in particular by a slender bell tower-wall.