Hôtel de Mercy-Argenteau, Private mansion in 9th arrondissement, Paris, France.
The building features eleven arched windows across its facade and includes a monumental entrance hall illuminated by a decorative glass ceiling.
Jean-Joseph de Laborde commissioned architect Firmin Perlin to build this mansion in 1778, later selling it to Count Mercy-Argenteau, imperial ambassador.
The first floor contains a Louis XVI salon decorated with Corinthian columns and allegorical bas-reliefs positioned above the doorways.
The mansion operates as a private property with limited public access, except during special heritage events when certain areas become accessible.
Between 2013 and 2019, this historical mansion served as Mozilla's Paris headquarters, bridging 18th-century architecture with modern technology development.
Location: 9th arrondissement of Paris
Architects: Firmin Perlin
GPS coordinates: 48.87200,2.34114
Latest update: June 23, 2025 09:48
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