The Acropolis is a set of ruins found on an island on the jungle planet of Ynoth. The island has six massive citadels surrounding the ruins of a seventh. This caused a stir amongst the Shelak Tribe as the protoss seer Khyar wrote several cryptic passages concerning a mystic Acropolis referred to "The Six and The One". It is written in his works that, "...the ruler of the Six shall use the One to become the Only..." Khyar, however, was also called the Mad Prophet in more than one historical record.