The Princess of Aldermar
From Tardis Wiki, the free Doctor Who reference
The Princess of Aldermar was a play written by Retorian Mellenger during the Chevallion Era.
An interactive holographic version ran on a continuous loop on Esselven Minor, repeating every ten days. When the people who started the program all died, there was no one to deactivate it. The play thus went on uninterrupted for five hundred years. (PROSE: Palace of the Red Sun)