Timeline

Heritage classified

Key figures

Origin and history

The church of Saint John the Baptist, also known as Saint Anne, located in Guerno (Morbihan), was built around 1570 to replace a Romanesque chapel built in 1160 by monks of the Order of Hospitallers of Saint John of Jerusalem. This first building, linked to the Templars, already attracted pilgrims thanks to a relic of the True Cross, preserved in a gold silver cross of the thirteenth century. The influx of faithful, including the sailors venerating Saint Anne and the pilgrims of Good Friday, justified the development of an external pulpit on the southern facade, engraved "AN LAN 1575 DE PAR PG GULLAS". The present church adopts a basilical plan in Latin cross, with a unique nave and a bedside in hemicycle, reflecting Gothic and Renaissance influences.

Ranked as a historical monument in 1971, the church retains notable architectural elements, such as a circular northwest tower dated 1580, a murmured entrance gate, and Gothic murals rediscovered between 2010 and 2011 in the southern transept. These paintings, dedicated to the Virgin Mary, are accompanied by plant and geometric motifs of the 14th and 15th centuries. The choir, rebuilt between 1580 and 1590, houses stone stalls, acoustic vases, and 16th century stained glass windows representing Christ and the coat of arms of the Dukes of Brittany. A side chapel, added in 1682, and an ossuary destroyed in 1842 testify to the evolution of the building.

The history of the church is marked by its link with the Hospitallers of St John of Jerusalem, confirmed by a charter of Conan IV in 1160. In the 16th century, the Commander of Carentoir, holder of the seigneury of Guerno, oversees major works, as attested by Simon Bronic's testimony in 1623, evoking the reconstruction of the "Holy Chapel" between 1580 and 1585. The tower, home to the relic of the True Cross and liturgical ornaments (calices, silver crosses, embroidery), symbolizes the spiritual and economic role of the site. In 1706 the tower was restored, and in 1710 a papal indulgence was granted for the chapel of Sainte-Anne.

Inside, the furniture includes a Christ lying in the Tombeau chapel, a carved wooden stand, and polychrome woodwork. Architectural re-uses, such as Corinthian capitals or columns transformed into trunks for offerings, suggest links with the early church. The murals of the north transept, once constellated with hermines, and the stained glass of the bedside, mixing Christian scenes and Breton emblems, illustrate the artistic richness of the place. Renovation work in 2010 restored these decorations, while preserving traces of the old chapter and the ossuary.

The site remains an active place of worship, with parochial functions attested as early as 1623 (baptisms, burials, processions). The presence of seven altars, a banner, and a bench reserved for commanders underscores its importance in the local religious hierarchy. Today owned by the commune, the church, open to visit, perpetuates its medieval and hospitable heritage, while offering an exceptional testimony of the Breton sacred art of the Renaissance.

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