Editing Grannus (section)

==Centres of worship==
[[File:CarolusThermen02.JPG|right|thumb|Hot springs such as those at Aquae Granni (today's [[Aachen]]) are thought to have been dedicated to Grannus.]]
[[File:Grand amphitheatre vgen.jpg|right|thumb|The amphitheatre in [[Grand, Vosges|Grand]], dedicated to Apollo. The name of Grand has been linked to Grannus.]]
One of the god's most famous cult centres was at Aquae Granni (now [[Aachen]], Germany). Aachen means ‘water’ in [[Old High German]], a [[calque]] of the Roman name of "Aquae Granni".<ref name="Aachen">Dr. Rita Mielke. [http://www.aachen.de/EN/ts/100_taking_a_cure/100_99/index.html History of Bathing]. Aachen.</ref> The town's hot springs with temperatures between 45&nbsp;°C and 75&nbsp;°C lay in the somewhat inhospitably marshy area around Aachen's basin-shaped valley region.<ref name="Aachen"/> Aachen first became a [[spa|curative centre]] in [[Hallstatt culture|Hallstatt times]].<ref name="Aachen"/>

According to [[Cassius Dio]], the Roman Emperor [[Caracalla]] (188 AD to 217 AD) unsuccessfully sought help from Apollo Grannus—as well as [[Aesculapius]] and [[Serapis]]—during a bout of physical and mental illness, visiting the god's shrine and making many [[votive offering]]s; Dio claims that the gods refused to heal him because they knew Caracalla's intentions to be evil.<ref>Cassius Dio, ''Roman History'' 78.15.</ref> Caracalla's visit to the shrine of ‘the Celtic healing-god’ Grannus was during the war with Germany in 213.<ref>CIL VI 2086; IvEph 802</ref>{{citation needed|date=September 2019}}