On the heights of Olliergues is the mother church of the parish of Olliergues until the 19th century. The church of Saint Martin is located in the middle of the old cemetery and is a very good example of Gothic Livradois. Building of the second half of the 15th century, recently restored, consists of a single nave of three bays, a choir and a sacristy. Two side chapels, later built, open into the north wall of the nave. Above the first bay of the nave is the bell tower, and in the southwest corner, a staircase in round tower allowing access. The choir, ending in half hexagon, is separated from the nave by a wrought iron grille of the 17th century. A work of metalwork of the same period forms the triumphal arch. The double arch above the south entrance door features a carved key depicting the Eternal Father with an inscription in Gothic characters. Sundial recently restored.
Its site offers a magnificent view of the Monts du Forez (Col du Béal et Pierre sur Haute)