Western sculpted portal Milieu XIVe siècle (≈ 1450)
Trilobed broken arch and rich decor.
XVe–XVIe siècle
Construction of the bell tower
Construction of the bell tower XVe–XVIe siècle (≈ 1650)
Fortified structure with angular foothills.
1806
Repairs not specified
Repairs not specified 1806 (≈ 1806)
Work mentioned without details.
XVIIIe siècle
Adding sacristy
Adding sacristy XVIIIe siècle (≈ 1850)
Extension south of the apse.
2008
Historical Monument
Historical Monument 2008 (≈ 2008)
Registration by order of 15 January.
Aujourd'hui
Aujourd'hui
Aujourd'hui Aujourd'hui (≈ 2025)
Position de référence.
Heritage classified
The entire church (Box B 39): inscription by decree of 15 January 2008
Key figures
Information non disponible - No character cited
The source text does not mention any specific historical actors related to this monument.
Origin and history
The Saint-Jean-Baptiste church of Siest, located in the Landes in New Aquitaine, is a Romanesque building marked by staggered construction campaigns from the twelfth to the fourteenth century. Its original plan, characterized by a single-ship nave and a semicircular apse, reveals a typical foundation of Romanesque religious architecture. The remains of a curved window on the southern wall of the nave and the simplicity of the plan still bear witness to this today.
In the 13th century, the choir was provided with a dogive vault, of which today only the dorets, the vaults and the triumphal arch were probably destroyed during the Wars of Religion. This Gothic transformation contrasts with the original Romanesque structure. The western gate, adorned with a broken trilobed arch and rich carved decoration, was added around the mid-14th century, illustrating the stylistic evolution of the building.
Between the 15th and 16th centuries, a massive bell tower with notable angular foothills was erected, reinforcing the defensive character of the church. This bell tower, accompanied by a circular staircase tower to the south, integrates into a mixed architectural apparatus: regular limestone stone for the nave and the choir, bells for the bell tower and the sacristy (probably added in the eighteenth century). Repairs were also carried out in 1806, without any precision as to their nature.
The building, classified as Historic Monument in 2008, preserves traces of its multiple metamorphoses, from Romanesque bases to Gothic additions and later developments. The cover in hollow tiles (except slate for the stair tower) and the limestone apparatus underline its regional anchorage. The partial destruction of the dogid vault and successive changes reflect a turbulent history linked to religious conflicts and community needs.
Today owned by the municipality of Siest, the church Saint-Jean-Baptiste embodies almost nine centuries of architectural and local history. His ogival portal, studied in the Palissy base, and his apse supported by a sacristy illustrate the superposition of the epochs. The absence of original vaults and the current panelling recall the vicissitudes suffered by this heritage, while highlighting its resilience and its adaptation to cultural and defensive needs.
