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Hôtel de Courcy is a private mansion located in Rennes, 9 rue Martenot, opposite the La Motte square and near . Built in around 1830, it was the property of several families of Rennes before being transferred to the State during the 20th century. It has been partly listed as a Historic Monument since December 19, 1973 (facades and roofs; internal staircase with its cage; four rooms with plasterwork decoration).