In Norse mythology, Asgard is the realm of the gods, the Ęsir, thought to be separate from the realm of the mortals, Midgard. The walls surrounding Asgard were built by a giant, in return for which he was to receive in payment the hand of Freya in marriage and the sun and the moon. This was agreed provided that the work was completed within six months. In order to avoid the payment, Loki transformed himself into a mare and lured away the giant's magic horse, Svadilfari. The job was not completed on time and the gods evaded the payment.
The plain of Idavoll is the centre of Asgard. The Ęsir meet there for discussions on important issues: the male gods meet in a hall called Gladsheim, and the female goddesses in a hall called Vingólf. They also meet daily at the Well of Urd, beneath Yggdrasill.