Latvian, Velns). He is sometimes considered the antithesis of Perkūnas and is the god of the underworld and death. Christianity considers "Velnias" akin to their "devil", though this is not in line with ancient beliefs. Perkūnas pursues his opponent, Velns, for picaroon or theft of fertility and cattle. Velnias hides in trees, under stones, or turns into various animals: a black cat, dog, pig, goat, lamb, pike, cow (compare to the Latvian representations of jods a creature with the cow hoofs) or a person. Perkūnas pursues an opponent in the sky on a chariot, made from stone and fire (Lithuanian ugnies ratai). Sometimes the chariot is made from red iron. It is harnessed by a pair (less often four or three) of red and white (or black and white) horses (sometimes goats). Compare the Lithuanian deity of horses and chariots Ratainyčia (Ratainicza mentioned in Lasick‘s works; from Lithuanian ratai - "wheel"). It is a mythologized image of a chariot of Didieji Grįžulo Ratai ("Grand Wheels of Grįžulas" (Ursa Major). It agrees with Samogitian representations, in which Perkūnas is a horseman on a fiery horse. On his heavenly chariot Perkūnas appears in the shape of a gray-haired old man with a big beard of many colors, in white and black clothes, holding a goat on a cord in one hand and a horn or an axe in the other. Perkūnas possesses many weapons. They include an axe or sledgehammer, stones, a sword, lightning bolts, a bow and arrows, a club, and an iron or fiery knife. Perkūnas is the creator of the weapons (Akmeninis kalvis, "the stone smith") or he is helped by the heavenly smith Televelis (Kalvelis). An opponent of Perkūnas hides itself in the hollow of a tree or a stone (attributes of Perkūnas). The culmination of Perkūnas' hunt for his opponent is a thunder-storm; it not only clears the ground of evil spirits, but returns the stolen cattle or weapons. Perkūnas is also connected to Thursday. Thursday is the day of the Thunderer in many traditions: compare Polabian Peräune-dǻn ("day of Perun"), Lithuanian Perkūno diena. Perkūnas is associated with the Roman god Jupiter in early sources. Thursday is a day of thunder-storms and rains, and also of weddings. Prussian Perkūns Simon Grunau (around 1520) describes a Prussian banner with Perkūns on it. The god is represented as an angry middle aged man with a twisted black beard, topped