Por-Bajin, aerial view from the west (IMAGE) University of Groningen Caption This is an aerial view of Por-Bajin from the west. The complex is situated on an island in a lake. Scientists have pinned its construction on the year 777 CE, using a special carbon-14 dating technique, based on sudden spikes in the carbon-14 concentration. Credit Andrei Panin Usage Restrictions With credit 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.