Odin is the Norse god of wisdom, death, and the runic alphabet. He is described as having only one eye. He had traded his other eye in exchange for drinking from a well of wisdom, guarded by the giant Mimir. The well was said to be located beneath one of three roots of the world tree Yggdrasil.
Odin as often disguised himself, wearing a cloak, and a broad hat. This allowed him to travel the world without revealing his idenity. Tolkien, the author of the Lord of the Rings, claimed to have modelled Gandalf in an 'Odinic wanderer.'
In the image, we see Odin riding his flying, eight-legged horse Sleipnir and wielding a magical spear named Gungnir. In other images, he is often accompanied by the two ravens Huginn and Muninn ("thought" and "memory") who bring him information from all over Midgard (Earth).
"The Great World History Book"