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Terahnee is an immensely beautiful age inhabited by people that descent from the Ronay survivors, and thus closely related to the D'ni.

The Terahnee and D'ni languages apparently had sound and grammar shifts parallel enough to remain mutually intelligible, despite the long separation and massive differences in culture and values.


The Terahnee descend from the bulk of the Ronay who fled the catastrophe of their original home, Garternay.

A book to Terahnee was kept by the D'ni, the minority who didn't follow the Terahnee, but opted to follow Ri'neref to a new Age. The book was sealed in a vault. Centuries later, Atrus discovered it in their search for survivors of the Fall of D'ni.

The local nobles, and eventually the king befriend Atrus and his companions, as fellow-survivors of D'ni. At first Atrus and his friends believe Terahnee is a culture for them to admire, and consider moving all the D'ni people to it; but later discover that Terahnee is built, and operated, by billions of slaves taken from their native Ages. Shortly thereafter, the ruling class of Terahnee are exterminated by a pandemic. The weakness of the master people prompts a bloody slave revolt; and the victors, thereafter, fight among themselves. The survivors of this second war, themselves guided by Atrus, ultimately establish a peaceful society.


The Terahnee culture was a patrilineal system of hereditary Lords, who rule over individual districts dominated by gigantic, decorative estates. The entire Age was ruled over by a King. To preserve an appearance of continuity, each king, and every lord, took on his family name as a title, upon accession, and discarded his given name.

Although it preserved much of the D'ni aesthetic, and boasted advanced technology and a luxurious lifestyle, Terahnee was a cruel civilization based on the slavery of entire Ages.[1] Nearly all the slaves lived and worked in subterranean passages, or in the interstices of their masters' houses; and so, were often called relyimah: the native word for 'Unseen'. In keeping with this custom, members of the ruling class were trained to avert their gaze from the sight of any slave, and to give orders only to the Overseers: a hereditary caste of intermediaries, religiously loyal to the Terahnee, but bred on another Age.