Massassi

The Massassi were a species who lived on Yavin 4, the fourth moon of Yavin Prime. Thousands of years before the Imperial Era, they built enormous stone temples on the moon for unknown purposes. It was believed that the Massassi may have been a slave race in thrall to the Sith, who brought them to the moon. The Massassi went extinct millennia before 0 ABY, sometime after finishing their temples.

Text and facts from the “Massassi” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.