Prime Oxima

Prime Oxima was a Sith Temple created during the time that the Sith-Jedi Divide had ended, causing the Jedi Order and the Sith Empire. Prime Oxima was the first and is the main temple created 37,000 years before the Battle of Yavin.

37,000 BBY - 37,050 BBY
After the end of the Sith-Jedi Divide, the Sith Empire and the Jedi Order decided to have both sides of the planet, Xhur. The sith spend 50 years creating the largest Sith Temple on the planet. During these 50 years, there was a chaotic event that didn't last until the creation of multiple Sith temples that involved a civil war.

1,100,000,000 ABY

Appearances

 * "The Divide" - Star Wars: Earth.