List of hôtels particuliers in Paris
In French contexts, an hôtel particulier is a townhouse of a grand sort. Whereas an ordinary maison (house) was built as part of a row, sharing party walls with the houses on either side and directly fronting on a street, an hôtel particulier was often free-standing, and by the 18th century it would always be located entre cour et jardin: that is, between the entrance court, the cour d'honneur, and the garden behind.
Source: Wikipedia — List of hôtels particuliers in Paris (CC BY-SA 4.0)