Cloud Ruler Temple was a fortress, and sanctuary, of the Blades. It is located north of Bruma, in the province of Cyrodiil.
During the Planemeld, Cloud Ruler Temple was slowly getting drawn into Coldharbour. The Planemeld ended soon enough to prevent the Temple to be absorbed into the realm of Molag Bal.
During the Oblivion Crisis, Martin Septim, the last of the Septim Dynasty and heir to the Ruby Throne, stayed at the Temple, due to it being a safe location against the Mythic Dawn. Cloud Ruler Temple was the base of operations against the Daedric invasion of Cyrodiil.
During the Great War, Cloud Ruler Temple was attacked by the Third Aldmeri Dominion, with its only survivor being Acilius Bolar.