Hôtel de la Motte-Sanguin, 18th-century private mansion in Orléans, France.

The Hôtel de la Motte-Sanguin is an 18th-century private mansion in Orléans, built between 1788 and 1792 on plans attributed to Victor Louis or Benoît Lebrun. Its long symmetrical facade of pale stone has a central entrance with a projecting balcony band, two rows of rectangular windows, and a low stone base with steps. The steep grey roof carries round dormer windows, small chimneys and a central square cupola with a dark dome and finial.

The building was constructed between 1788 and 1792 by architect Victor Louis on the site of medieval fortifications from 1466 that had served as an artillery battery. This location transformed from military use to residential architecture for the urban elite.

The name comes from a mound of earth thrown up when the moat was widened to raise cannon above the ramparts, later respelled in 1852 after Antoine Sanguin, bishop of Orléans from 1539 to 1555 and cardinal. Since 2014 the seven flats carved out of the house have lodged visiting researchers of the University of Orléans through the Studium association.

The property currently houses researchers affiliated with the University of Orléans through the Studium association, so it is not regularly open for casual visits. Access is best arranged during cultural events or through special guided tours.

The roof employs a truss system based on designs by Philibert Delorme that was considered innovative when the building was constructed. This advanced technique allowed for a stronger and more efficient roof structure.