Artaeum

The Isle of Artaeum is third largest island in Summerset archipelago, south of Moridunon village of Potansa and west of the mainland village of Runcibae. It is most notable for being home to the Psijic Order, perhaps the oldest monastic order on Tamriel.

History
Around the end of First Era, the Isle of Artaeum mysteriously vanished. It reappeared exactly 500 years later. Members of the Order, who were thought dead, reappeared as well, refusing to discover were the island was during that time.

The Isle of Artaeum vanished again around 4E 101, approximately 100 years before the events of Skyrim.

Some sources claim that the island was visited by Sotha Sil, member of the Tribunal, before the island first time vanished.

Geography
The Isle of Artaeum is said to have idylic orchards and pastures, silent lagoons, the misty woodlands and Psijic architecture that seems to be as natural but wondrous as surroundings. The Ceporah Tower, a structure built by a civilization several hundred years before Altmer came here. It is one of Artaeum's most prominent features.