Succeeding a Merovingian church whose remains were discovered in 1951 (as well as a cemetery dating from the 6th century), the foundation of the current church could date back to the 10th or 11th century. with a modernization in the 12th century, where it takes more or less its current appearance. The bell tower was destroyed during the Hundred Years' War and then rebuilt with the facade in the 15th century.
A fire due to a violent storm affected the bell tower in 1943. The upper part was reinterpreted by the addition of square bays giving it a defensive character. The slate spire has not gone up.
The Saint-Pierre church is a Romanesque building with certain archaic features. The facade, of great severity, dates from the 15th century. Almost devoid of ornamentation, it consists of a broken arched portal with prismatic moldings, confined by a Gothic niche (on the right) and surmounted by a narrow bay.
The nave, formerly divided into 5 bays, now has only 4, separated by columns backed by pilasters. The whole was originally covered with ribbed vaults, destroyed in 1837, replaced by an arched vault and subsequently dismantled in turn. The nave is covered with an exposed framework. Large transept arches delimit the square of the transept, covered with a barlong dome on squinches. The crosspieces are covered with a pointed barrel vault, and are extended by apsidioles.
Semi-circular arcades, supported by fine columns with capitals decorated with plant or geometric motifs, punctuate the walls of the apse, covered with an oven bottom where traces of frescoes dating from the 12th century are visible, although degraded. century. The walls of the nave, the transept and part of the choir retain traces (from the 17th century) of the funeral liter of a lord of Mornac.
The exterior offers, on the north wall, the remains of a Romanesque portal (11th century). The bedside, typical of the Saintongeais Romanesque, is made up of 3 horizontal registers, delimited by cords. The last level is made up of an arcade formed of arched arcades carried by columns with capitals decorated with plant, animal or geometric motifs.
The whole is surmounted by a cornice with modillions where animals and human or demonic faces are represented. Buttress columns topped with capitals decorated with interlacing and stylized plants punctuate the walls