By 1892, Louis Comfort Tiffany—son of the Tiffany & Co. founder—was already well known for his work as an interior decorator and designer of stained-glass windows and lamps. But in that year, he developed a glass-coloring technique that would seal his reputation as America´s greatest Art Nouveau designer. Called Favrile, a twist on an Old English word meaning handmade, it was created by exposing molten glass to metallic vapors. Rather than just sitting on the surface, the color was embedded in the glass itself giving it a beautiful, iridescent quality. Tiffany himself considered this peacock-feather vase to be an important example of his work.