Alessia received the divine inspiration for her Slave Rebellion at Sancre Tor, and here she founded her holy city. It was also here that Pelinal Whitestrake slew the Ayleid king Haromir of Copper and Tea in single combat. Sancre Tor has lain in ruins since the beginning of the Third Era, and the surrounding region is virtually uninhabited. Now all communications with the north are through the passes at Chorrol and Bruma, and Sancre Tor's citadel and underpassages have become the refuge of various savage goblin tribes.
With the decline of the Alessian Order, the seat of religious rule of Cyrodiil moved south to the Imperial City, but Sancre Tor remained a mountain fortress and major religious center until the rise of the Septim Dynasty. In 2E 852 the city was suffering under one of the periodic occupations by Skyrim and High Rock invaders. King Cuhlecain sent his new general, Talos, to recapture the city and expel the northern invaders. During his siege Sancre Tor was destroyed and abandoned. Realizing the strategic weakness of the site, General Talos, later Tiber Septim, resolved to abandon Sancre Tor, and during his reign, no attempt was made to rebuild the city or the citadel.
During the Battle of Sancre Tor, General Talos is said to have recovered the Amulet of Kings from the tomb of Reman Cyrodiil III. Theologians ascribe the long centuries of political and economic turmoil following the collapse of the Reman Dynasty to the loss of the Amulet of Kings, and associate the renaissance of the Cyrodilic Empire in the Third Era with Tiber Septim's recovery of the Amulet from Reman III's tomb. The ruins of Sancre Tor were later corrupted by the Underking, prompting them to be sealed shut by the Grandmaster of the Blades in the 38th year of Tiber Septim's reign.
Sancre Tor's mines provided some wealth, but the poor soils and harsh climate of the remote mountain site meant it must be supplied with food and goods from the Heartlands. Further, located in one of the few passes through the Jeralls, its fortunes were subject to the instability of relations with Skyrim. When relations were good with Skyrim, it prospered through trade and alliance. When relations were bad with Skyrim, it was vulnerable to siege and occupation by the Nords.
Alessian historians asserted that Sancre Tor was magically concealed and defended by the gods. Records of Sancre Tor's repeated defeats and occupations by northern invaders gives the lie to this assertion. The entrance to the citadel was indeed concealed by sorcery, and the citadel and its labyrinthine subterranean complex were defended by magical traps and illusions, but their secrets were betrayed to besieging Nords by the Breton enchanters who crafted them.
During the Three Banners WarEdit
Sai Sahan, a revered Redguard warrior who lived during the Second Era and a member of the original Five Companions, hid the Amulet of Kings within the Sancre Tor to prevent the legendary Worm King Mannimarco, at the time also a member of the original Five Companions, from using it for his treacherous and evil goals.
After recovering from his experience in the Halls of Torment, Sai guided the Vestige towards the Amulet of Kings.
During the Oblivion CrisisEdit
In the closing days of the third era, the Hero of Kvatch was sent by Martin Septim to recover the Armor of Tiber Septim in order to complete the ritual to gain entry to Mankar Camoran's paradise. He was warned by Jauffre that the tomb had become evil long ago, and the warning was correct: undead infested both the surface and subterranean ruins. The Hero entered the ruins and discovered that the Underking, Zurin Arctus, had ensnared four of Tiber Septim's Blades, cursing them to guard the tombs forever as skeletal beings. The Hero was able to defeat them and, with the assistance of their ghosts, removed the Underking's influence and recovered the Armor of Tiber Septim.
One enduring feature of the legend of Sancre Tor is the ancient tombs of the Reman Emperors. Following the defeat of the Akaviri invaders, Sancre Tor enjoyed a brief resurgence of wealth and culture under Reman Cyrodiil and his descendants, Reman I and Reman II. Tracing his ancestry to St. Alessia, and following the tradition that St. Alessia was buried in the catacombs beneath Sancre Tor, Reman built splendid funerary precincts in the depths of the ancient citadel underpassages. Here the last Reman Emperor, Reman III, was buried in his tomb with the Amulet of Kings.