aqueduct system of Constantinople (IMAGE) Johannes Gutenberg Universitaet Mainz Caption The 426-kilometer-long aqueduct system of Constantinople Credit ill./©: Cees Passchier Usage Restrictions This image may only be used in connection with the press release "The Aqueduct of Constantinople: Managing the longest water channel of the ancient world", issued by Johannes Gutenberg University Mainz on May 11, 2021. 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.