Quolas Quolas was a tree - city inhabited by the Sathari species on the planet Arbooine . Overview . A tree - city on the planet Arbooine , Quolas was smaller than the planet ' s capital city Zeilo , but still one of the largest settlements on the world . Populated completely by Sathari natives , the tree - city was governed by a Reeve who led the city from a manor located at the summit of the tree . Built into the boughs of a massive elrit tree , the city ' s structures were orb - like in shape and made of branches and other natural material . Suspended from the ancient and thick branches of the tree , each building was connected by rope bridges . Additionally , the Sathari had carved out narrow , cramped tunnels that spread throughout the tree ' s trunk and root system . Large , open areas allowed for residents from multiple levels to move freely through the otherwise dense foliage . The bark and branches of the tree were exquisitely carved by artisans into massive reliefs , statues , patterns and art . Because the city was located within a tree , fire could not be used to illuminate the city and therefore the Sathari relied on natural light . During the day , light was shunted into the city using large amber lenses at the top of the tree and reflected down using large mirrors . The light passing through the large red leaves cast the city in a perpetual dusk throughout daylight hours , while glowrods illuminated the walkways during the evening . Fire torches were only used on the exterior battlements as it frightened away bearsloth s and other predators . Layout . The city of Quolas was a vertical city , located in the boughs , roots and trunk of a living , healthy elrit tree that towered above the surrounding plains and forests . The city spanned hundreds of meters in diameter , and was several times taller than it was wide . Quolas proper was connected to several smaller satellite tree - towns by rope bridges and ladders . Connecting the orb - like structures were bridges , ramps , rope - drawn elevators , stairs , and ladders ; though the Sathari were more than capable of flying between levels or riding on the back of domesticated tarvix es . The tarvixes were kept within stables in the city ' s lower levels ; citizens kept their own mounts there and they were occasionally loaned to visitors in need of transportation . The only entrance to the city is found at ground level , where a large metal gate was built into the tree ' s outer wall . Due to a lack of visitors , the gates were generally kept closed to prevent wild animals from entering the trunk of the tree . As the city is also accessible from air and by climbing the trunk , battlements and barricades were set at intervals along the trunk ' s length to stop climbing beasts on their ascent . Guardhouses at each battlement installation staffed the walls and formed the city watch . A large prison was seldom used before the reign of Gel Marcolf , during which the prison was overflowing with political opponents . The city proper was higher up in the tree ' s branches , where they formed many , many levels . The more wealthy residents of the city lived higher up in the branches , while the Reeve ' s manor was located at the tree ' s apex . Because of the historic feud between the Tumris and Helshar houses , both families are divided into sizable districts just beneath the Reeve ' s manor . Amid the homes and storefronts was the Sathir Temple , a small religious site where Sathiri went to pray and worship nature . Another focal point of the city was the Pillar of Ancestors , a wooden column carved from woven branches . Hundreds of meters tall , the Pillar was thousands of years old and depicted the history of the city . History . Established long before the Clone Wars , the city of Quolas found itself divided economically , politically , and socially between the Helshar and Tumris clan s . While not all citizens of the tree - city were part of the two families , those who were not were often times forced into supporting a side . In the final days of the Galactic Republic , the feud between the families erupted into open conflict . Both Tumris and Helshar leaders declared themselves Reeve and their respective supporters began attacking one another . Drawn to the planet by a vision , Jedi Knight Suljo Warde entered the city and brought the conflict to a temporary halt . Invoking his authority as a general of the Grand Army of the Republic , Warde appointed his young friend Gel Marcolf as interim Magistrate of the city until he could return with Republic forces to assist in restoring the peace . When Warde never returned and the Republic was replaced by the Galactic Empire , the citizens of Quolas rose up against Marcolf ' s rule in the wake of the Empire ' s assent to power , arguing that the authority which placed him in power no longer existed . Refusing to step down , Marcolf unwittingly used the Force to draw in and control a close cadre of guards and hired mercenaries to secure himself as Reeve . Soon after , the Imperial governor agreed to acknowledge Marcolf ' s reign so long as taxes continued to be paid on time . While Marcolf allowed the two houses to remain prominent fixtures in the city ' s economics , the new Reeve drastically reduced their power compared to his own to ensure that a coup was not possible . By the time of the Galactic Civil War , a band of offworlders visited the city in search of a kyber crystal in the possession of Marcolf . Finding the city ' s residents living in constant fear of their Reeve and forced to toil endlessly just to pay their taxes , the offworlders hoped to retrieve the crystal quickly . As they learned that Marcolf had been responsible for destroying many ancient statues and reliefs , they came across Pathran Helshar and his city - wide resistance movement . The offworlders managed to retrieve the crystal , but the events surrounding this exchange are lost to history .