Phrynian

The Phrynians are a sapient humanoid civilization from the planet Phryne, which have cloaked their entire homeworld with an invisibility shield (although it doesn't affect their moon).

Culture and society
They're a race of archivists who describe themselves as "the guardians of the histories, the treasures and the artifacts of over a hundred planets".

History
Their civilization was one of the first to be invaded by the Dalek Empire.

Appearances

 * The Dalek Chronicles, "The Archives of Phryne" (1966)