Complex sentence: Marx Rumpolt, head cook at the Mainz elector Daniel Brendel von Homburg, written with the New cookbook from 1581, the first textbook for professional chefs in training.
Split into simpler sentences: Marx Rumpolt, head cook to Daniel Brendel von Homburg, Elector of Mainz. His Ein New Kochbook, written in 1581, was the first textbook for professional chefs in training.