Goseck Circle: The Oldest Known Solar Observatory

In 1991, inspectors from the German government took aerial photographs of a small German town called Goseck and saw something strange.  On the ground, there appeared to be a giant circular ridge hidden beneath a field.  It would take archaeologists 12 years to realize that this ridge was the remains of an ancient solar observatory.  Archaeologists also found the remnants of ritual fires and human bones with cut marks on them indicating that the circle was not just for star gazing but also for human sacrifice.  Curiously, a 3,600 year old bronze disc was discovered just 25 kilometers away from the site and is considered to be the oldest concrete representation of the cosmos.  It shares a striking similarity with Goseck Circle.