The Aesir are a pantheon of Norse spirits. Their realm is Asgard. Among the central themes of surviving Norse mythology is the confrontation and eventual merger of two pantheons, the Aesir and the Vanir. Norse mythology is generally told from the perspective of the Aesir, or rather from the perspective of later Christian chroniclers who identified more with the Aesir than the Vanir. Aesir is believed cognate with Asia. Many scholars believe they originated in what is now Turkey. Alternatively, the word is seen as related to Ashura. Important Aesir spirits include Odin and Thor.