In Norse mythology, the Yggdrasil is a giant mythological tree that holds together the Nine Worlds or realms of existence.
At the very top of Yggdrasil, an eagle lived and at the bottom of the tree lived a dragon named Nidhug. Both hated each other and were bitter enemies. The Nine Worlds are guarded by the serpent Jormungandr. Yggdrasil is one of many variations of the Cosmic Axis or Universal World Tree known to all human cultures and home to many fascinating creatures.
The image of Yggdrasil appears on the famous Överhogdal Tapestry, which dates to the year 1066 and depicts the events of Ragnarok, the doom of the Gods and apocalyptic record of the coming comet.