
Aux portes de la ville haute de Châteaudun, Saint-Jean-de-la-Chaîne superpose huit siècles d'architecture : chœur roman du XIIe siècle, clocher gothique et nef Renaissance, le tout gardé par un portail de cimetière d'une rare sobriété.

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The church of Saint-Jean-de-la-Chaîne stands like a palimpsest of stone in Châteaudun: each period has left its mark, from the Romanesque choir to the vaults of the Renaissance nave, without the ensemble ever losing its coherence. Listed as a Historic Monument since 1907, it bears witness to the long religious and urban vitality of a Dunois town that was one of the strongholds of the county of Blois in the Middle Ages. What makes Saint-Jean-de-la-Chaîne truly unique is the legibility of its constructional layers. Unlike many buildings that have been altered to the point of obliterating their origins, the church retains its Romanesque transept and chancel virtually intact, offering the attentive visitor a direct dialogue with the 12th-century sculpture and masonry. The south bell tower, added in the following century, introduces the Gothic vocabulary with a restraint typical of the Champagne region. The nave, rebuilt at the very beginning of the 16th century, reflects the transition to the Renaissance that characterised Loire architecture at the time. The experience is that of a local church that has survived the centuries without losing its local soul. The interior space is on a human scale, encouraging the kind of intimate contemplation that large cathedrals no longer allow. The proportions of the Romanesque choir, its soberly ornate capitals and its cul-de-four apses invite you to slow down and grasp the permanence of the place. Outside, the gateway to the former cemetery - a 16th-century construction set back slightly from the façade - adds a funerary and memorial dimension that considerably enhances the interpretation of the site. Châteaudun itself, overlooking the River Loir from its limestone hillock, offers an exceptional setting for a visit: the castle of the Counts, the collegiate church of Saint-André and the narrow streets of the upper town make up a dense heritage complex that is little visited in relation to its true value.
Saint-Jean-de-la-Chaîne has a Latin cross plan, typical of medium-sized medieval parish churches, built around a Romanesque choir with a semi-circular apse, a projecting transept and a single nave rebuilt in the early 16th century. The materials used are those of the Dunois region: local limestone, soft and easy to carve, which over time takes on the golden blond hue so characteristic of the monuments of Perche and Dunois. The 12th-century choir and transept form the heart of the Romanesque church. Their thick walls, semicircular arches, capitals with stylised foliage and narrow bays bear witness to a solid mastery of construction, typical of the workshops active in the Loir valley at the time. The south bell tower, added in the 13th century, rises up in several levels punctuated by geminated bays with pointed arches, introducing Gothic verticality into the overall composition. Its silhouette marks the landscape of the upper town without competing with the belfry of the neighbouring collegiate church. The Renaissance nave, dating from the first quarter of the 16th century, has a structure with barrel vaults or late ogival cross-vaults, combining a flamboyant vocabulary with early humanist ornamentation. Set back, the gateway to the former cemetery, framed by pilasters and crowned by a classical entablature, is the most distinctive Renaissance feature on the site: sober and elegant, it foreshadows the architectural grammar that was developing simultaneously at the nearby Château des Longueville.
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Châteaudun
Centre-Val de Loire