Harmony in Blue and Gold: The Peacock Room is a work of interior decorative art created by James McNeill Whistler and Thomas Jeckyll, translocated to the Freer Gallery of Art in Washington, D.C. Whistler painted the paneled room in a unified palette of blue-greens with over-glazing and metallic gold leaf. Painted between 1876 and 1877, it now is considered one of the greatest surviving Aesthetic interiors, and best examples of the Anglo-Japanese style.

Thomas Jeckyll was an English architect who excelled in the creation of metalwork and furniture strongly influenced by Japanese design, and is best known for his planning in 1876 of the ‘Peacock Room’ at 49 Princes Gate, London.