German -born American designer. Colonna trained in Brussels and moved to the United States in 1882. After briefly working for Associated Artists, the company of Louis Comfort Tiffany, he moved to Ohio, where he produced a series of designs published as the Essay on Broom Corn. The book reveals Colonna to have been a visionary designer. He returned to Paris in 1898 to work for Siegfried Bing. Along with Georges de Feure and Eugene Gaillard, his designs formed the nucleus of Bing’s pavilion at the 1900 Paris Universal Exposition.