Another mysterious fact about the Angkor complex is its location 72 degrees of longitude east of the Pyramids of Giza. The temples of Bakong, Prah Ko and Prei Monli at Roluos, south of the main Angkor complex, are situated in relation to each other in such a way that they mirror the three stars in the Corona Borealis as they appeared at dawn on the spring equinox in 10,500 BC. It is interesting to note that the Corona Borealis would not have been visible from these temples during the 10th and 11th centuries when they were constructed.