In Celtic mythology, Taranis or Taranus is the god of thunder, who was worshipped primarily in Gaul, Gallaecia, Britain, and Ireland but also in the Rhineland and Danube regions, amongst others. Taranis, along with Esus and Toutatis as part of a sacred triad, was mentioned by the Roman poet Lucan in his epic poem Pharsalia as a Celtic deity to whom human sacrificial offerings were made. Taranis was associated, as was the Cyclops Brontes ("thunder") in Greek mythology, with the wheel.