Catoptromancy

 
Catoptromancy (Gk. κάτοπτρον, "katoptron", "mirror," and μαντεία, "manteia", "divination"), also known as captromancy or enoptromancy, is divination using a mirror.
Pausanias, an ancient Greek traveler, described as follows: 
In Ancient Rome, the priests who used catoptromancy were called "specularii".