Erich Strenger (1922-1993), an author, photographer, designer, and illustrator, left his mark on the look of Porsche during the company's formative years in the early '50s and '60s with a design language that, for the most part, continues to bear his signature to this day. He also created countless print products for this successful sports car maker, including Christophorus Zeitschrift für die Freunde des Hauses Porsche, the brainchild of Erich Strenger and Richard von Frankenberg. Over the course of a collaborative relationship with Porsche spanning more than thirty years, the graphic artist, who started out working alone, founded an advertising agency in the heart of Stuttgart with a staff of up to eleven permanent employees. There, Strenger would later create countless racing posters, much like those he had designed in his early days working for Dr. Ing. h.c. F. Porsche AG as a freelancer in the early '50s.