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Origin and history

The church of Saint-Jean-Baptiste de Mont-Saint-Jean, built in the 12th century, is a historical monument located in the enclosure of an old castle, on a hill of the eponymous commune of Bourgogne-Franche-Comté. Its Romanesque architecture is distinguished by a rectangular portal with monolithic tympanum, a vaulted nave in a cradle, and sideways covered with brick arches. The bedside includes a cul-de-four choir flanked by two apsidioles, while a vaulted crypt of ridges, accessible by a staircase in square, extends under the choir and southern apsidiole. The tower of the bell tower, decorated with twined bays and carved modillons, dominates the building, some of which of the structures (crypt, choir, absidioles) dates back to the original castral chapel.

Becoming a parish church in the 15th century (consecrated in 1453), the building underwent major changes between 1874 and 1879 under the impulse of the parish priest Simon: addition of brick vaults, partitioning of the south side (former chapel Sainte-Pélagie), creation of lateral chapels, and piercing of windows to standardize the openings. Major restoration works were carried out in the 19th century, including the renovation of the bell tower (1869), the construction of an octagonal arrow (1887), and interventions on the frame, cover, and crypt (1866–73). The building, inscribed in the Historical Monuments in 1927, preserves remarkable medieval elements, such as the bell tower's sloping columns or the smooth capitals of the crypt.

The crypt, the oldest part, consists of three vaulted galleries and a semicircular apse illuminated by days in the middle. It used to communicate with the cemetery via a side chapel with a hagioscope (window allowing to see the altar from the outside). The bell tower, accessible by a spiral staircase, has rare architectural features, such as cross-columns on its north face. The carved modillons, visible on the bell tower and apse cornices, testify to the Romanesque craftsmanship. The materials used — cut stone for the top parts, flat tiles and stone for the covers — reflect local techniques and successive adaptations.

The church illustrates the evolution of a medieval place of worship, moving from a castral chapel (XII century) to a parish church enlarged in the Renaissance, then remodeled in the modern era. The 19th and 20th century work campaigns, although partially transforming its structure, preserved key elements such as the apparent ground-punished frame visible in the attic. Today, a communal property, the building remains a testimony of the religious and architectural history of Burgundy, marked by Romanesque, Gothic (gothic vaults) and neoclassical influences (restaurants of the nineteenth century).

Historical sources mention works documented in 1866 (crypt), 1869 (clocher), 1873 (voûts and cover), and 1887 (arrow). The destruction of the ancient sacristy and the redevelopment of interior spaces (such as the displacement of the side door in the northern absidiole) reflect the liturgical and aesthetic needs of successive periods. The inscription in the Historic Monuments in 1927 underscores its heritage value, linked both to its seniority and to the richness of its carved decorations (modillons, capitals).

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