The Scarlet Monastery is one of four strongholds in the world belonging to the fanatical Scarlet Crusade, the others being the Scarlet Bastion within the ruins of Stratholme, the town of Hearthglen, and the town of Tyr's Hand. Located in the northeast corner of the blighted Tirisfal Glades, the Scarlet Monastery was once a cathedral to the Light, now taken over by zealots. The Scarlet Monastery is a complex of four wings, each an instanced dungeon, for both Horde and Alliance characters. The mobs respawn at the same rate in each of them, except for the Cathedral.
All of the instanced wings of the Scarlet Monastery are stored on the same map. That means, if you could fly, you can enter the Cathedral, fly, and end up in the Graveyard wing.
The Monastery was once a proud bastion of Lordaeron's priesthood - a center for learning and enlightenment. With the rise of the undead Scourge during the Third War, the peaceful Monastery was converted into a stronghold of the fanatical Scarlet Crusade. The Crusaders are intolerant of all non-human races, regardless of alliance or affiliation. They believe that any and all outsiders are potential carriers of the undead plague - and must be destroyed. Reports indicate that adventurers who enter the monastery are forced to contend with Scarlet Commander Mograine - who commands a large garrison of fanatically devoted warriors. However, the monastery's true master is High Inquisitor Whitemane - a fearsome priestess who possesses the ability to resurrect fallen warriors to do battle in her name.
At some point after the formation of the Scarlet Crusade, the Monastery was attacked by the Scourge three times in the Summertide Assaults.
During the Hallow's End in Year 24, the Headless Horseman was created in the Monastery by Balnazzar using fel energies over the dead body of Thomas Thomson.
The Alliance helped the Scarlet Renegades, a small faction of rebel Crusaders who aimed to take over the monastery. They were led by their increasingly unhinged champion, Joseph the Insane. TheHorde assisted a contingent of Forsaken troops and abominations, led by Dark Ranger Velonara in annexing the Monastery for good. Neither side was ultimately successful, and the Monastery remained firmly under the control of the Scarlet Crusade.
Despite heavy losses across all fronts, the Scarlet Crusade has survived within the Scarlet Monastery. Here, the remaining crusaders prepare to continue their battle against the undead and those they judge guilty of carrying the taint of undeath. However, a mysterious Hooded Crusader seems intent on taking them down from the inside.