Zigoola Sith temple
From Wookieepedia, the Star Wars wiki.
The Sith temple on Zigoola was a large structure made of reddish-black stone. Senator Bail Organa of Alderaan and Jedi Master Obi-Wan Kenobi went to Zigoola to seek Sith artifacts. Obi-Wan Kenobi was subjected to intense mental attacks emanating from a Sith holocron inside the temple. When Obi-Wan smashed the holocron the attacks ceased. The temple was destroyed in the process and the Jedi Council lost the opportunity to study the Sith artifacts.
