Caelestë-Materiae

Caelestë-Materiae is a mountain within the Blue Mountains, near the present-day location of the Citadel of the Wild. It is thought to be an avatar of the plane of Mount Celestia, placed on the Material Plane. It is the tallest mountain south of the Elemental Plane of Earth.
According to the Prayer of Saint Scala, Queen Scala climbed this mountain at the end of the Age of Anxiety, to beg the Wild Dynasty gods for forgiveness and a merciful direction for her people.