Urðarbrunnr (
Old Norse "Well of Urðr"; either referring to a
Germanic concept of fate—
urðr—or the
norn named
Urðr) is a
well in
Norse mythology. Urðarbrunnr 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. In both sources, the well lies beneath the world tree
Yggdrasil, and is associated with a trio of norns (
Urðr,
Verðandi, and
Skuld). In the
Prose Edda, Urðarbrunnr is cited as one of
three wells existing beneath three roots of Yggdrasil that reach into three distant, different lands; the other two wells being
Hvergelmir, located beneath a root in
Niflheim, and
Mímisbrunnr, located beneath a root near the home of the frost
jötnar. Scholarly theory and speculation surrounds the well.