Snorri Sturluson was a poet, historian and politician of medieval Iceland.
His Edda (the Prose Edda, or Snorri’s Edda), written around 1220, is one of the most important sources preserving Norse mythology as a system. It records Yggdrasil, Ymir, Fenrir, Jormungandr and Sleipnir, as well as light elves and dark elves and the master smiths who made the gods’ weapons, the prototypes of elves and dwarves.