Temenos is an area in Limbus. This area is only accessible if the Chains of Promathia expansion is installed, Promathia Mission 7-5:The Warrior's Path is completed, and the necessary Limbus prerequisites are met.
Temenos looks much like the Grand Palace of Hu'Xzoi and The Garden of Ru'Hmet. It is the "Ou'Hpat Obelisk" mentioned in the storyline. Trading a single colored chip obtained from one of the three initial areas to the Matter Diffusion Module in Al'Taieu at time of entry will open access to one of the first three "layers" of Central Temenos. A different colored chip may be found on each of these layers; trading all three of these specific chips will open access to the fourth layer of Central Temenos, where Proto-Ultima may be fought.
Area layout is as follows:
Obtain: Emerald Chip
Obtain: Ivory Chip
(Mystic Avatars found randomly in chests; not all may be encountered)
Requires: Metal Chip
Requires: Emerald Chip
Obtain: Orchid Chip
Requires: Scarlet Chip
Obtain: Cerulean Chip
Requires: Ivory Chip
Obtain: Silver Chip
Chance of Spawning from Opened Chests(?)
Temenos is the Greek word for a sacred space or holy precinct (or sacred ground). That space is the land which a sanctuary or temple is built on. The temple is only part of the sacred space; the rest is usually left unaltered (a grove of trees, a natural spring, etc). Temenos meant the space that was reserved or protected for the gods. Temenos has *other* connotations, but those seem to be relatively modern and take the term and give it a new meaning. The definition given here is the original meaning it had in ancient Greek society. Temenos is Greek for "to cut", "to delimit", or "to divide".