Gudrun Zapf von Hesse is a master book binder and lettering artist in pre- and post-WWII Germany. In the late 1940s, she started teaching at the Städel School of Art in Frankfurt. A typeface that she had been working on since the 1930s, Diotima, was released by D. Stempel AG around this time. Somehow, she must have met the chief in-house type designer there (Hermann Zapf), as they were married in the early 1950s.
She lives with her husband in Darmstadt, Germany. The Zapfs have a beautiful house, full of typographic treats.