The sacred tree at Uppsala was a sacred tree

Tree worship

Tree worship refers to the tendency of many societies throughout history to worship or otherwise mythologize trees. Trees have played an important role in many of the world's mythologies and religions, and have been given deep and sacred meanings throughout the ages...

 located at the Temple at Uppsala

Temple at Uppsala

The Temple at Uppsala was a religious center in Norse paganism once located at what is now Gamla Uppsala , Sweden attested in Adam of Bremen's 11th century work Gesta Hammaburgensis ecclesiae pontificum and in Heimskringla, written by Snorri Sturluson in the 13th century...

, Sweden

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

, in the second half of the 11th century. It is not known what species it was, but a scholar has suggested that it was a yew tree

Taxus baccata

Taxus baccata is a conifer native to western, central and southern Europe, northwest Africa, northern Iran and southwest Asia. It is the tree originally known as yew, though with other related trees becoming known, it may be now known as the English yew, or European yew.-Description:It is a small-...

.

It is even more sparsely documented than the famous temple by which it stood. In the 1070s, the writer of a scholium

Scholium

Scholia , are grammatical, critical, or explanatory comments, either original or extracted from pre-existing commentaries, which are inserted on the margin of the manuscript of an ancient author, as glosses. One who writes scholia is a scholiast...

 in Adam of Bremen

Adam of Bremen

Adam of Bremen was a German medieval chronicler. He lived and worked in the second half of the eleventh century. He is most famous for his chronicle Gesta Hammaburgensis Ecclesiae Pontificum .-Background:Little is known of his life other than hints from his own chronicles...

's Gesta Hammaburgensis ecclesiae pontificum

Gesta Hammaburgensis ecclesiae pontificum

Gesta Hammaburgensis ecclesiae pontificum is a historical treatise written between 1075 and 1080 by Adam of Bremen. It covers the period from 788 to the time it was written. The treatise consist of:*Liber I...

explained:

Near that temple is a very large tree with widespread branches which are always green both in winter and summer. What kind of tree it is nobody knows. There is also a spring there where the pagan are accustomed to perform sacrifices and to immerse a human being alive. As long as his body is not found, the request of the people will be fulfilled.

The description of the tree and the location of a well nearby are reminiscent of the evergreen, Yggdrasil

Yggdrasil

In Norse mythology, Yggdrasil is an immense tree that is central in Norse cosmology. It was said to be the world tree around which the nine worlds existed...

, which stood above the Well of Urd, and it is possible that the Swedes consciously had created a copy of the world of their Norse gods at Uppsala.
The later Iceland

Iceland

Iceland , described as the Republic of Iceland, is a Nordic and European island country in the North Atlantic Ocean, on the Mid-Atlantic Ridge. Iceland also refers to the main island of the country, which contains almost all the population and almost all the land area. The country has a population...

ic source, Hervarar saga

Hervarar saga

Hervarar saga ok Heiðreks is a legendary saga from the 13th century combining matter from several older sagas. It is a valuable saga for several different reasons beside its literary qualities. It contains traditions of wars between Goths and Huns, from the 4th century, and the last part is used as...

, contains a description of how the tree was used in the pagan rites, concerning an event taking place only a few years after the scholium was written. It is in reference to the ancient Indo-European ritual

Proto-Indo-European religion

Proto-Indo-European religion is the hypothesized religion of the Proto-Indo-European peoples based on the existence of similarities among the deities, religious practices and mythologies of the Indo-European peoples. Reconstruction of the hypotheses below is based on linguistic evidence using the...

 of horse sacrifice

Horse sacrifice

Many Indo-European religious branches show evidence for horse sacrifice, and comparative mythology suggests that they derive from a Proto-Indo-European ritual.-Context:...

:

Svein

Blot-Sweyn

Sweyn was a Swedish king c. 1080, who replaced his Christian brother-in-law Inge as King of Sweden, when Inge had refused to administer the blóts at the Temple at Uppsala. There is no mention of Sweyn in the regnal list of the Westrogothic law, which suggests that his rule did not reach...

, the King's brother-in-law, remained behind in the assembly, and offered the Swedes to do sacrifices on their behalf if they would give him the Kingdom. They all agreed to accept Svein's offer, and he was then recognized as King over all Sweden. A horse was then brought to the assembly and hewn in pieces and cut up for eating, and the sacred tree was smeared with blood. Then all the Swedes abandoned Christianity, and sacrifices started again. They drove King Ingi

Inge I of Sweden

Inge the Elder was a King of Sweden.-Biography:Inge was the son of the former King Stenkil and a Swedish princess. Inge shared the rule of the kingdom with his probably elder brother Halsten Stenkilsson, but little is known with certainty of Inge's reign...

 away; and he went into Västergötland

Västergötland

', English exonym: West Gothland, is one of the 25 traditional non-administrative provinces of Sweden , situated in the southwest of Sweden. In older English literature one may also encounter the Latinized version Westrogothia....

.