Grannus is a healing spirit associated with therapeutic springs. Roman historian Dio Cassius, who lived in the late second and early third centuries, placed Grannus in the same league as Asklepios and Serapis. (Apparently Emperor Caracalla could not be cured at any of the three deities’ shrines.) Grannus was a major Celtic deity, venerated over a wide swathe of territory from Brittany in the west as far as Hungary where a third-century CE temple was dedicated to Apollo Grannus and Sirona. The Romans identified Grannus with Apollo.
Grannus had shrines throughout Europe, including one at the hot springs of what is now Aachen in modern Germany, once called Aquae Granni, “Waters of Grannus.” Devotees came to bathe in the sacred waters. Grannus’ temples contained dormitories where sleeping petitioners could incubate dreams and receive healings and visitations directly from Grannus.
Encyclopedia of Spirits: The Ultimate Guide to the Magic of Fairies, Genies, Demons, Ghosts, Gods & Goddesses– Written by Judika Illes Copyright © 2009 by Judika Illes.