Thassor

From Tardis Wiki, the free Doctor Who reference

As the Thirteenth Doctor explained to Team TARDIS, the Thassor were one of "the ancient races". She described them as "amazing" storytellers, inventors and explorers. As a way to spread information, they built the Orbs of Thassor, sending them out among the stars as a way to share their legacy long after they were gone. (TV: Nikola Tesla's Night of Terror)