Si.427 and Dr Daniel Mansfield (IMAGE) University of New South Wales Caption Si.427, pictured here held by Dr. Daniel Mansfield at the Istanbul Archaeological Museum, is thought to be the oldest known example of applied geometry. Credit UNSW Sydney Usage Restrictions Must credit UNSW Sydney License Original 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.