Hôtel de Roquelaure, Private mansion in 7th arrondissement, France.

Hôtel de Roquelaure stands at 246 Boulevard Saint-Germain, a light stone mansion built between 1722 and the early 1730s. Its courtyard front has a triangular pediment over five tall windows with wrought-iron balconies, five glass doors below, and a stone balustrade along the roofline. A raised terrace with balustrade and wide steps faces the garden facade.

The building was constructed in the early 18th century for Marshal de Roquelaure and underwent significant redesign during the 1720s by architects Pierre Cailleteau and Jean-Baptiste Leroux. These renovations established the architectural character that defines the property today.

The mansion contains nine protected rooms with period furnishings that reflect how high-ranking French officials lived and worked over the centuries. Today it functions as a working space for the Ministry of Ecological Transition, giving the historic interior an active governmental purpose.

Access to the building requires advance arrangements through official channels since it serves as an active ministerial office. Guided visits are offered during special heritage events and should be arranged ahead of time.

Four surviving 1722 drawings show how the architect fitted the new mansion around the older Hôtel de Villetaneuse, whose structure appears in black while the additions are drawn in red. The garden facade is far wider than the courtyard one, and the courtyard front only gained its central steps in the second half of the 18th century under Molé.