Seven Mounting Heavens of Celestia

Background
Celestia consists of a vast peak rising out of the River Oceanus. One passes through seven layers, ascending the Mountain. Good and order rule in perfect balance, overseen by the Hebdomad, seven powerful archons, all of whom were once mortal martyrs. These celestial paragons take council with the gods who also live in Heaven, and the two groups frequently assist one another. Mount Celestia is the most heavily fortified place in the planes, white walls tall and immeasurably strong. Heaven stands bulwark for all that is good, its hosts defending the other upper planes against the endless hordes of The Abyss.

History
Sometime in the 1370s DR, Amaunator moved his House from Elysium to Celestia.