What is Celtic polytheism?
[[File:Celtic expansion.PNG|thumb|Maximum expansion of the celts in light green, about 300 BC. The original range,about 500BC is shown in dark green.]] [[File:Coligny.jpg|thumb|the [[Coligny calendar]] was found near [[Lyon]], in 1897. It is a [[lunisolar calendar]]]] [[File:Gundestrup antlered figure.jpg|thumb|Image of a horned figure on the {{plainlink|url=https://en.wikipedia.org/wiki/Gundestrup_cauldron|name=Gundestrup cauldron}}, about the god [[Cernunnos]].]] '''Celtic [[polytheism]]''' is the name for a set of [[belief]]s or [[religion]]. Another term frequently used for Celtic polytheism is '''Celtic paganism'''.<ref>Ross, Anne 1974. ''Pagan Celtic Britain: studies in iconography and tradition''. London: Sphere Books Ltd.</ref><ref>Hutton, Ronald 1991. ''The pagan religions of the ancient British Isles: their nature and legacy''. Oxford, UK and Cambridge, USA: Blackwell.</ref><ref>Jones, Prudence and Pennick, Nigel (1995). ''A history of Pagan Europe''. Routledge.</ref> It was originally held by the [[Europe]]an people called [[Celt]]s today. There was a movement to convert these people to [[Christianity]]; this process was finished by about 500 AD. The first findings relating to this set of beliefs can be dated to about [[500 BC]]. The system of beliefs lasted roughly one [[millennium]], in the [[La Tène culture|La Tène period]], and the [[Roman Empire|Roman era]]. In the case of the Celts on the [[Great Britain|British Isles]], this also included parts of the [[Iron Age]]. Celtic polytheism was one of the Iron Age [[polytheism|polytheistic]] religions of the [[Indo-European religion|Indo-European]] family.<ref name=Cunliffe>Cunliffe, Barry 1997. ''The Ancient Celts''. Oxford University Press, p184.</ref><ref>Ross, Anne 1986. ''The Pagan Celts''. London: B.T. Batsford, p103.</ref> There are many different names for the gods of the [[Celtic pantheon]]. These names have either been recorded by [[Ancient Greek]] or [[Ancient Rome|Ancient Roman]] [[geographer]]s, or they have been found in inscriptio