Thryss

"That planet's inhabitants have been dead for years."

- Han Solo

Thryss was a planet in the Mid Rim that was home to the forest people called Thryssians, who were humanoid religious people who had thought to have died out about 10,000 BBY.

History
During 12,000 BBY, the native Thryssians were at the peak of their planetary power and had many temples and cities in the planets forests, however in 10,174 BBY, the Thryssians went to secret underground cities to avoid the Thryss Plague, and had been thought dead.

In 4 BBY, many species had populated the renovated Thryssian cities and had made a thriving community until the resurfacing Thryss Plague, and it spread across nearby planets untill 2 ABY when the planet was recolonized.