This is the chapel of Duke Leopold the Fourth - the Glorious. It is dedicated to St. Catherine. Leopold is one of the most important dukes of historic Austria from the province of Styria. His race - Babenberger race. He participated in a crusade to Egypt in southern France and in Spain against the Moors. He supported the Minnesingers and was the one who gave city rights to Vienna and Salzburg in the 13th century. Translated with Google Translate