Proto-Indo-European mythology realm of Midgard. Other dragon-slaying myths are also found in the Germanic tradition. In the "Völsunga saga", Sigurd slays the dragon Fafnir and, in "Beowulf", the eponymous hero slays a different dragon. Reflexes of the Proto-Indo-European dragon-slaying myth are found throughout other branches of the language family as well. In Zoroastrianism and Persian mythology, Fereydun, and later Garshasp, slays Zahhak. In Slavic mythology, Perun, the god of storms, slays Veles and Dobrynya Nikitich slays the three-headed dragon Zmey. In Armenian mythology, the god Vahagn slays the dragon Vishap. In Romanian folklore, Făt-Frumos slays the fire-spitting monster Zmeu. In Celtic mythology,
Sacred trees and groves in Germanic paganism and mythology abode of gods and spirits. Scholars presume that publicly revered trees such as that at the temple in Uppsala were regarded as counterparts to the mythic world tree Yggdrasil. The present section divides particularly notable examples into texts discussing the religious activities of the ancient Germanic peoples involving trees and groves ("Germanic paganism") and their appearance in the myths of the Germanic peoples, particularly the North Germanic peoples ("Germanic mythology"). Sacred trees and groves are mentioned throughout the history of the ancient Germanic peoples, from their earliest attestations among Roman scribes to references made by medieval monks. In Norse mythology,