Exxilon
From Tardis Wiki, the free Doctor Who reference
Exxilon was a planet on which the Doctor encountered the Daleks. This planet once held a highly advanced civilization built by the Exxilon people. It was they who built the Great City of the Exxilons which according to the doctor, before its destruction, was one of the 700 Wonders of the Universe. (DW: Death to the Daleks
