“So this is the Ice Dragon Shrine. The final destination of Anri's treacherous journey...”
The Ice Dragon Temple (or Shrine) is a location in Fire Emblem: Mystery of the Emblem and its remake. It and its surroundings comprise the setting for Chapter 13: Frozen Land, Chapter 13x: Within the White Darkness, and Chapter 14: A Mystery Revealed.
It is a huge building located towards the frozen north east of Archanea, inhabited by Ice Dragons. Hundreds of years ago, Anri traveled to the Ice Dragon Temple in order to obtain the divine sword Falchion from Gotoh. During the events of Mystery of the Emblem, Marth follows in the footsteps of his ancestor, as he travels to the temple to obtain the Lightsphere from Gotoh. There, he has to fight his way through the bitter cold weather and the dangerous Ice Dragons that have gone wild.