Yavin Jedi Academy (Jedi Renaissance)

The Yavin Jedi Academy, also referred to as the Jedi Academy of Archaeology , was built on by the Massassi to worship Naga Sadow, a Sith Lord who had enslaved and mutated the Massassi using alchemy. Millennia after its initial construction, the Temple was the site of the historic Battle of Yavin, which saw the Jedi Order conquer Yavin IV and drive out the spirit of Exar Kun from the ruins once and for all. Slowly purging the world of its dark side taint, the Jedi restored balance on Yavin IV and settled the ancient Academy of Archaeology within the Great Temple of Naga Sadow. Stripping it of its ancient Sith heritage, the temple served as a Ranger Academy in addition to its archaeological studies.

Ancient history
Around 5,000 BrS, having fled his failed campaign of galactic conquest during the Great Hyperspace War, the Sith Emperor Naga Sadow hid in the jungles of alongside his loyal Imperial warriors called the Massassi. The forested fourth moon of the gas giant of Yavin, Yavin IV was rich in the Force and offered isolation from the collapse of the Empire Sadow was leaving behind. Together Sadow and his horde settled within the thick rainforests of Ersham Ridge near to a mighty river that bisected the continent of Kla'sido'rinin. Sadow ordered his warriors to clear the area and start building towering monuments in his honor, his way of recreating the Empire he had lost. Through alchemical experimentation, the Sith Emperor mutated the Massassi further, turning them into Force-wielding monsters. The most momentous of the monuments built by the Massassi on the jungle moon was the Great Temple, a colossal ziggurat of native stone and earth. Built without the aid of modern gravitonic construction techniques, the Massassi used mere hand technology and simple machines, along with the dark side abilities imbued by their Emperor. Transporting the stone from nearby hills, the Massassi worked to terraform the world around the Temple so as not to create blight around the tranquility of their Temple. The Massassi continued to worship Naga Sadow at the Temple, even after he entered a state of hibernation inside an oubliette buried deep within the bowels of the complex. The former Sith warriors persisted for over a thousand years, long after their god's presumed death at the hands of Freedon Nadd, until Exar Kun eliminated most of their numbers in 3,996 BBY3,961 BrS. However, Kun allowed the Massassi warrior Kalgrath to remain behind in isolation chambers, guarding the Temple in a state of hibernation.

Defeat of the Sith
In the wake of the Clone Wars nearly five millennia after the construction of the temple, the Jedi Order was alerted to a dark side disturbance on the planet. Countless Force-sensitives in the area had been drawn to Yavin IV and mysteriously disappeared, reappearing suddenly in Year 35 at the help of several capital ships. Drawing the attention of the Galactic Republic and the Confederacy of Independent Systems, the Jedi led a joint attack fleet to Yavin IV to eliminate the threat of the Sith once and for all. Led by Jedi Grand Master Tomac Moorcé, the Republic-Confederacy fleet assault the planet and engaged the Sith fleet directly. Realizing that the fleet was being remotely controlled by the spirit of Exar Kun, Grand Master Moorcé led a Jedi strike force into the heart of the Great Temple itself. While the legendary Masters Plo Koon and Ki-Adi-Mundi were slain within the heart of the Temple by Massassi warriors, Moorcé confronted the spirit of Exar Kun, siphoned off his knowledge, and destroyed his spirit through his command of the Force. With Kun's spirit eradicated, the Sith fleet surrendered with their commanders free of their possession.

Despite the fighting and the passage of time, the Great Temple remained habitable, preserved through the Force over the millennia. In need of a home for the Academy of Archaeology, the Jedi High Council ordered the Great Temple to be transformed into a Ranger Academy so that the moon could be restored to Balance in the Force. As part of a campaign to reclaim old Sith worlds, the Jedi Builders Corps.