Louis Comfort Tiffany (1848-1933) was an American artist and designer, best known for his work in stained glass. His father was Charles Lewis Tiffany, the founder of Tiffany and Company. Yeah, those lamps are his – or at least they're his studio's. Recent scholarship has revealed that Clara Driscoll, director of the Tiffany Studios' Women's Glass Cutting Department, was the actual designer of the best and most popular Tiffany lamps, despite Louis and the lads up front taking most of the credit.
It's not a complete Singin' in the Rain set-up, however, and Louis Comfort was still an excellent craftsman in his own right. His vases, mosaics, tiles and lamps are highly sought after by museums and private collectors. For examples of his work, check out the MoMA's pictures of the pieces in their collection. The green peacock vase is especially nice.