Sainte Chappelle (IMAGE) Penn State Caption Penn State researcher John Mauro snapped this photo of Sainte-Chapelle while vacationing in France. Mauro's recent research shed light on the glass transformation of medieval windows. Credit John Mauro, Penn State Usage Restrictions Non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.