Labyrinthian

A large Nordic ruin southeast of Morthal, filled with draugr, skeletons, trolls and wisps. The dragon priest Morokei waits inside.

Quests here

The Staff of Magnus: Speak to Mirabelle in the College courtyard after the anomalies are dealt with. Reward: Staff of Magnus, and the mask Morokei.

Maar (Terror) of Dismay: Word wall at the heart of Shalidor's Maze, the walled garden on the north side of Labyrinthian.
Ul (Eternity) of Slow Time: Word wall deep inside Labyrinthian, passed during the College quest The Staff of Magnus.

Ancient Helmet of the Unburned – Heavy armor: Behind a locked gate inside Labyrinthian.
Morokei: Taken from the Dragon Priest Morokei at the end of Labyrinthian, during the College quest The Staff of Magnus.
Wooden Mask: Beside a skeleton in the round, half-buried building among the outer ruins of Labyrinthian.
Konahrik: Set the eight named masks of Skyrim on the shrine in Bromjunaar Sanctuary and the dragon head at its centre opens.
Diadem of the Savant – Circlet: The reward at the centre of Shalidor's Maze, beside Labyrinthian. A second copy lies in the snow outside Froki's Shack.
Equilibrium – Alteration: Not sold anywhere. The only copy lies in Labyrinthian Chasm, which opens during The Staff of Magnus.
Drainheart Sword – Sword: Dropped by the spectral draugr inside Labyrinthian, met during the College quest The Staff of Magnus.
Drainblood Battleaxe – Battleaxe: Dropped by the spectral draugr inside Labyrinthian, met during the College quest The Staff of Magnus.
Drainspell Bow – Bow: Dropped by the spectral draugr inside Labyrinthian, met during the College quest The Staff of Magnus.
Staff of Magnus – Staff: Taken from the Dragon Priest Morokei at the end of Labyrinthian, in the College quest of the same name.