Snorri quotes his own source saying: " The sun will go black, earth sink in the sea, heaven be stripped of its bright stars ;...." ( Section 56 ).

In the Prose Edda Snorri Sturluson quotes many stanzas attributed to Bragi Boddason the old ( Bragi Boddason inn gamli ), a court poet who served several Swedish kings, Ragnar Lodbrok, Östen Beli and Björn at Hauge who reigned in the first half of the 9th century.

Snorri especially quotes passages from Bragi's Ragnarsdrápa, a poem supposedly composed in honor of the famous legendary Viking Ragnar Lodbrók (' Hairy-breeches ') describing the images on a decorated shield which Ragnar had given to Bragi.

At that time, versions of the Prose Edda were well known in Iceland, but scholars speculated that there once was another Edda — an Elder Edda — which contained the pagan poems Snorri quotes in his book.

Snorri then quotes a stanza by the skald Þjóðólfr of Hvinir ( c. 900 ).

At that time versions of the Prose Edda were well known in Iceland but scholars speculated that there once was another Edda — an Elder Edda — which contained the pagan poems which Snorri quotes in his Prose Edda.

Snorri Sturluson often quotes Grímnismál and clearly used it as his source for this information.

Snorri then quotes many skaldic verses which demonstrate this.

In the Skáldskaparmál section of the Prose Edda, Snorri Sturluson quotes a poem by the skald Snæbjörn, which could be considerably older than the version found in Gesta Danorum and Chronicon lethrense.

Snorri then quotes a stanza from Þjóðólfr of Hvinir's Ynglingatal:

Snorri then quotes a stanza from Þjóðólfr of Hvinir's Ynglingatal:

After presenting this story of Anund, Snorri Sturluson quotes Þjóðólfr of Hvinir's Ynglingatal:

The poem goes into detail about the Norse cosmogony and was evidently used extensively as a source document by Snorri Sturluson in the construction of the Prose Edda who quotes it.

Snorri then quotes a relevant verse by the poet Eyvindr skáldaspillir.

In his Edda Snorri Sturluson quotes many stanzas attributed to Bragi Boddason the old ( Bragi Boddason inn gamli ), a court poet who served several Swedish kings, Ragnar Lodbrok, Östen Beli and Björn at Hauge who reigned in the first half of the ninth century.

Snorri especially quotes passages from Bragi's Ragnarsdrápa, a poem supposedly composed in honor of the famous legendary Viking Ragnar Lodbrók (' Hairy-breeches ') describing the images on a decorated shield which Ragnar had given to Bragi.

In Olaf the Holy's saga, Snorri Sturluson quotes Thorgny Lawspeaker on king Björn:

The primary sources regarding Asgard come from the Prose Edda, written in the 13th century by Icelandic Snorri Sturluson, and the Poetic Edda, compiled in the 13th century from a basis of much older Skaldic poetry.

The Poetic Edda is valuable in representing older material in poetry from which Snorri tapped information in the Prose Edda.

Snorri took a prescriptive as well as descriptive approach ; he has systematized the material, and often notes that " the older poets didn't always " follow his rules.

Snorri took a prescriptive as well as descriptive approach ; he has systematized the material, and often notes that " the older poets didn't always " follow his rules.

While Gudrød is portrayed as a king in Oppland in some older texts, Snorri writes that he was a king in Vestfold.

In Gylfaginning, Snorri presents the mythological version taken no doubt from his sources.

By the time of the Ynglinga Saga, Snorri had developed his concept of Asgard further, although the differences might be accounted for by his sources.

The pair are attested in both the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.

The bridge is attested as Bilröst in the Poetic Edda ; compiled in the 13th century from earlier traditional sources, and as Bifröst in the Prose Edda ; written in the 13th century by Snorri Sturluson, and in the poetry of skalds.

Fenrir is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda and Heimskringla, written in the 13th century by Snorri Sturluson.

Freyja is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources ; in the Prose Edda and Heimskringla, both written by Snorri Sturluson in the 13th century ; in several Sagas of Icelanders ; in the short story Sörla þáttr ; in the poetry of skalds ; and into the modern age in Scandinavian folklore, as well as the name for Friday in many Germanic languages.

They are attested in the Poetic Edda, a collection of epic poetry compiled in the 13th century from earlier traditional sources, in the Prose Edda, written in the 13th century by Snorri Sturluson, and in the poetry of skalds.

Huginn and Muninn are attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources ; the Prose Edda and Heimskringla, written in the 13th century by Snorri Sturluson ; in the Third Grammatical Treatise, compiled in the 13th century by Óláfr Þórðarson ; and in the poetry of skalds.

Hel is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.

Loki is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources ; the Prose Edda and Heimskringla, written in the 13th century by Snorri Sturluson ; the Norwegian Rune Poems, in the poetry of skalds, and in Scandinavian folklore.

Njörðr is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, the Prose Edda, written in the 13th century by Snorri Sturluson, in euhemerized form as a beloved mythological early king of Sweden in Heimskringla, also written by Snorri Sturluson in the 13th century, as one of three gods invoked in the 14th century Hauksbók ring oath, and in numerous Scandinavian place names.

The event is attested primarily in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.

Ratatoskr is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.

It is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and in the Prose Edda and Heimskringla, both written in the 13th century by Snorri Sturluson.

Sleipnir is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.

Sigyn is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.

Valhalla is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, the Prose Edda, written in the 13th century by Snorri Sturluson, Heimskringla, also written in the 13th century by Snorri Sturluson, and in stanzas of an anonymous 10th century poem commemorating the death of a Eric Bloodaxe known as Eiríksmál as compiled in Fagrskinna.

Víðarr is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, the Prose Edda, written in the 13th century by Snorri Sturluson, and is interpreted as depicted with Fenrir on the Gosforth Cross.

Yggdrasil is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.

Scholars disagree about the various, too often contradictory, accounts of his life given in sources from his era of history, such as the Anglo-Saxon Chronicle, Adam of Bremen's Gesta Hammaburgensis Ecclesiae Pontificum, and the Heimskringla, a 13th-century work by Icelandic author Snorri Sturluson.

Norse sources of the high medieval period, most prominently Snorri Sturluson's Heimskringla, also give a Polish princess as Cnut's mother, whom they call Gunhild and a daughter of Burislav, the king of Vindland.