In Slavic mythology, Perun (Cyrillic: Перун) is the highest god of the pantheon and the god of thunder and lightning. His other attributes were fire, mountains, wind, the oak, iris, eagle, firmament (in Indo-European languages, this was joined with the notion of the sky of stone), horses and carts, weapons (the hammer, axe (Axe of Perun), and arrow), and war. He was first associated with weapons made of stone and later with those of metal.