Andrew Mellon Building, National Historic Landmark office building in Dupont Circle, Washington, D.C., United States.
The Andrew Mellon Building is a six-story Beaux-Arts structure at Massachusetts Avenue featuring symmetrical windows and an ornamental stone facade. Decorative architectural elements are distributed across the entire exterior, giving the building its formal appearance.
Architect Jules Henri de Sibour designed this building in 1917, and Treasury Secretary Andrew Mellon later resided there. Its conversion from residential to office use reflects shifting needs in Washington's development.
The building's design carries traces of its origins as a luxury residence, with refined details visible in its stonework and proportions. Visitors can observe how these classical elements have been adapted for modern office use while maintaining their original character.
The building sits at the intersection of 18th Street and Massachusetts Avenue in Dupont Circle, with easy access to public transportation. Its central location makes it convenient to explore the surrounding architectural and commercial area.
The original residence contained just six residential units but had quarters for over forty servants, revealing the sharp social divisions of early 1900s Washington. This extensive staff accommodation was typical of the wealthiest households of the era.
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