D. Stempel AG was a German typographic foundry founded by David Stempel (1869–1927), in Frankfurt am Main, Germany. Many important font designers worked for the Stempel foundry, including Hans Bohn, Warren Chappell, F. H. Ehmcke, Friedrich Heinrichsen, Hanns Th. Hoyer, F. W. Kleukens, Erich Meyer, Hans Möhring, Hiero Rhode, Wilhelm Schwerdtner, Herbert Thannhaeuser, Martin Wilke, Rudolf Wolf, Victor Hammer, Hermann Zapf, and Gudrun Zapf von Hesse. With the introduction of Memphis in 1929, the foundry was the first to cast modern slab serif typefaces.

Hermann Zapf was a German type designer and calligrapher who lived in Darmstadt, Germany. He was married to the calligrapher and typeface designer Gudrun Zapf-von Hesse. Typefaces he designed include Palatino, Optima, and Zapfino. He is considered one of the greatest type designers of all time.