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Origin and history

The Commandery of Mormant, located between Leffonds and Richebourg in Haute-Marne, finds its origins in the early 12th century as a hospital dedicated to welcoming pilgrims and the poor. Founded under the name of Maison-Dieu Sainte Marie de Mormant in 1121 by Hugues II Bardoul de Broyes-Chateauvillain, the site was initially placed under the rule of Augustine canons and the guardianship of the bishop of Langres. The complex includes a refectory hospital, a chapel Saint-Nicolas, and a cemetery, reflecting its charitable vocation. An adjacent agricultural estate provides its livelihood, while a house for conversants is built outside the monastic enclosure.

In the 13th century, after management conflicts and unsuccessful attempts at reform, Pope Boniface VIII entrusted Mormant to the Templars in 1300 to restore the site, then in spiritual and material decline. The Templars set up a structure typical of their commands: chapel, house, dormitory, and hotel, while ensuring the protection of pilgrimage routes. Their presence is brief: in 1307, the arrest of the Templars by order of Philip IV the Bel put an end to their administration. Laurent de Beaune, preceptor of Mormant, was executed in 1314 alongside Jacques de Molay.

From 1312 Mormant moved to the Hospitallers of the Order of St John of Jerusalem, who made it a lucrative agricultural centre after the Hundred Years' War. In the 15th century, they reorganized the site into two fortified courtyards (conventual and agricultural), adding a strong house, a dovecote, and outbuildings. The church of Sainte-Marie, rebuilt in the 16th century by Pierre de Bosredon, marks the architectural climax of the place. The French Revolution led to the dismantling of the site: sold as a national good, it became a private farm, losing its nave church and its strong house in the 19th century.

Today, the House of God (XII-15th centuries), classified as a historical monument since 1989, remains with its ogival vaults and a 16th century fresco. The old hospital, the remains of the enclosure, and the vault of Bosredon are also protected. The site illustrates the transitions between religious orders (augustins, Templiers, Hospitallers) and the architectural adaptations related to their successive missions: medieval hospitality, military defense, and agricultural operations.

Mormant owned several regional outbuildings, such as the commanderies of Beauchemin and Bonnevaux, or the seigneury of Faverolles. Its history reflects the political and religious stakes of southern Champagne, from crusades to the Revolution and the dissolution of military orders. Local excavations and archives (Haute-Marne) continue to inform its role in the temporal and hospital networks.

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