Gylfaginning

thumb|upright=1.3|Gylfi is tricked in an illustration from Icelandic Manuscript, SÁM 66 Gylfaginning (Old Norse: 'The Beguiling of Gylfi' or 'The Deluding of Gylfi'; 13th century Old Norse pronunciation ) is the first main part of the 13th-century Prose Edda, after the initial Prologue. The Gylfaginning takes the form of a dialogue between a Swedish King Gylfi and three men on thrones in Asgard called High, Just-As-High, and Third. Gylfi asks many questions of the three men on the history and future of the Æsir. The creation and eventual destruction of the world are described, as are many other aspects of Norse mythology. While the Gylfaginning never makes it explicit, the three are often presumed to be guises of Odin.

The second part of the Prose Edda is the Skáldskaparmál and the third Háttatal. The work is often attributed to or considered to have been compiled by Snorri Sturluson.