Almendres Cromlech standing stones, 10 km west of Evora, Portugal

In the third stage of use, around 3,000 BC, many of the stones were repositioned to align with the moon, the sun and the stars. It is predicted that the site was used as an important religious site by a religion that had possessed an in-depth understanding of celestial motions and star alignments. Interestingly, all of the ring formations are aligned with the largest of the granite standing stones.