February to March 1791. During the revolutionary period of the National Convention (1792-1795), the town took the name of Arnay-sur-Arroux.Marie-Odile Mergnac, The First Names of the Revolutionary Calendar, Paris, Archives and culture, 2006, , p. 35. It was the capital of the district of Arnay-sur-Arroux from 1790 to 1795. On 3 December 1870, during the Franco-Prussian War, a military engagement took place here. Heraldry AdministrationList of Successive MayorsTwinning Arnay-le-Duc has twinning associations with: Wörrstadt (Germany). Demography In 2017 the commune had 1,425 inhabitants. Culture and heritage Civil heritage The commune has a number of buildings and structures that are registered as historical monuments: A House at Place Carnot (16th century) The Maugars House at Rue du Collège (16th century) A House at 24 Rue Saint-Honoré (16th century) The Hospice of Saint-Pierre at Rue Saint-Jacques (1686). The Hospice contains several items that are registered as historical objects: A Soup Turreen (18th century) Many Plates and Dishes (16th-18th century) A Mortar bowl (1595) 7 Pharmacy pots (18th century) A Sideboard (18th century) A Painting: Virgin and child (15th century) The Hospital of Saint-Pierre at Rue Saint-Jacques (1692) The Hospital contains a very large number of items that are registered as historical objects. The Tower of Motte-Forte (14th century) The Château of the Princes de Condé (1550) The Chateau of the Princes of Condé Picture Gallery Other sights Religious heritage The commune has two religious buildings that are registered as historical monuments: The former Capuchin Convent (1776) The Convent, which is now the local hospital, contains four Paintings (16th-19th century) which are registered as historical objects. The former Priory of the Order of Saint-Benedict (15th century) is outside the walls in the Saint-Jacques district. The Church of Saint-Laurent was originally created as a fortified chapel for the Château de la Motte-Forte. In 1092 the chapel was donated to the town by the nobleman Gérard d'Arnay and from that time on served as the town's church. The church has particularly attractive stained glass windows. The church as it is known today was created during the 15th (nave) and 16th century (chancel and ten chapels). The loft and steeple were added during the 18th century. The Church contains many items that are registered as historical objects: Statues (16th century) A Group Sculpture: Virgin of Pity (16th century) 6 Candlesticks and an Altar Cross (1860) Paintings (15th-17th century) The War Memorial (1924) Monumental Paintings (19th century)