Jedi Academy ( Ossus ) The Jedi Academy on Ossus was built to replace the lost temple on Yavin 4 . It was located between a large mountain ridge and a deep valley . Conception of the Academy . The New Jedi Order , having suffered the loss of the Jedi Praxeum on Yavin 4 and the numerous deaths associated with the war against the Yuuzhan Vong , was in desperate need for reconstruction and order . Because all Jedi activities were formerly coordinated from the Massassi Temples on the jungle moon , Grand Master Luke Skywalker deemed it paramount to settle a permanent replacement for the headquarters of the Jedi Order . During the Jedi Conclave on Zonama Sekot following the peace accords with the Yuuzhan Vong , Master Kam Solusar suggested that the new Praxeum be established on Ossus , a historical world home to the Great Jedi Library of the Old Jedi Order . Master Skywalker agreed to the proposal in 30 ABY , and the new Academy was immediately constructed . History . In 36 ABY during the Swarm War , the Ossus Academy was the location of the first official " Jedi Convocation " of the New Jedi Order where Luke Skywalker declared himself the Grand Master of the Order and also declared that the Jedi would serve the Galactic Federation of Free Alliances . The Ossus Academy was not only staffed by Jedi , but also native citizens of Ossus and relations of the Jedi , who worked in many areas — including the hangar . During the height of the Academy ' s operations , support staff consisted of 1 , 200 members . Master Mara Jade Skywalker was a strong advocate of the peaceful retreat , and established a safe and secure residence on Ossus for her child , Ben Skywalker . Masters Kam and Tionne Solusar were appointed the administrators of the Ossus Academy , dictating the structure of the curriculum , as well as appointing instructors for the various classes held there . During the Second Galactic Civil War of 40 ABY , Jedi Jaina Solo , Zekk , and Captain Jag Fel found themselves on Ossus looking for Alema Rar , they found little activity at the Academy . This was due to the fact that the Academy was being held hostage by the Galactic Alliance Guard under the orders of Jacen Solo , who had become a Sith Lord and taken the name Darth Caedus . Jag and Jaina headed for flight control while Zekk hid in the jungle . On reaching flight control , the duo was ambushed by GAG soldiers . After all were hit by their own stun bolts , Major Salle Serpa appeared from Orame ' s private offices and explained the “ safety ” they were bringing to the Jedi . During the following weeks , Jaina stayed with the Padawans , until the guard attacked herding the younglings away from their protectors . During the attack , Jedi Masters Kam and Tionne Solusar , were seriously injured . After this event , the Jedi Order fled for the safety of a recently converted Imperial base on Endor , and later the base on Shedu Maad . After the end of the War , the Ossus Academy was to remain empty for a time due to monetary restraints and the ongoing strife between the Jedi Order and the new Chief of State Natasi Daala . All Jedi Knights were recalled to Coruscant , while the younger students were secreted away to the Shedu Maad base . During the conflict with the Lost Tribe of the Sith , the Academy had a total of 322 students and provided housing and work for their 923 family members . After the Temple was reoccupied , the Galactic Alliance authorized a joint Yuuzhan Vong Shaper and Jedi project to terraform the war devastated planet of Ossus and bring back its original beauty . After the success of the project , many planets turned to the Yuuzhan Vong to terraform their own planets . With the help and oversight of the Jedi , the Yuuzhan Vong were assigned to terraform one hundred worlds . The results were fantastic , exceeding expectations , and would prove beneficial to the inhabitants of the planets . However , it was then that the new Sith Order , which had been established by Darth Krayt in 130 ABY , sabotaged the terraforming . As a result of this tampering , plants began mutating and the inhabitants of the planets began to sprout strange , bony growths , seen previously only in victims of the Yuuzhan Vong during the Yuuzhan Vong War . Though the Jedi expected sabotage , the galaxy at large , particularly the Fel Empire , blamed the Yuuzhan Vong . The Galactic Alliance had supported this beneficial terraforming under the encouragement of the New Jedi Order , and found itself facing a secession movement with this deadly new development . The Empire used this to its advantage , luring member worlds — many of whom still chafed at the conduct of the New Republic during the Yuuzhan Vong War — away from the Alliance and weakening the government . The resulting Sith – Imperial War lasted three years , during which Imperial forces reconquered Coruscant . The Alliance fell and was absorbed into the Empire . The Jedi were forced to retreat to their temple on Ossus , which was later the focus of an attack by Sith forces led by Darth Nihl and Imperial forces led by Moff Rulf Yage . During the Massacre at Ossus , the Sith and Imperial forces slaughtered most of the Jedi that had gathered there , including Kol Skywalker , but about half of the Order was not present , and thus escaped the massacre , going into hiding afterward . They also shot down Cade Skywalker as he tried to avenge his father ' s death . Shortly after , the Sith turned against Emperor Roan Fel and his Imperial Knight s . The Temple was raided and emptied by the pirate Rav , who was aided by Cade Skywalker , days after it fell to the Sith . Shaper Nei Rin , who was off - world at the time of the attack , returned to find the temple destroyed . She and her assistants cremated Kol Skywalker and gathered all of the artifacts they could find ; hiding them in an underground cave . Cade , Wolf Sazen , K ' Kruhk , and Shado Vao discovered Rin and her guards and stayed under the Temple to wait out the Sith ' s plotting . The Temple was eventually destroyed in 137 ABY under orders from Darth Stryfe , in an attempt to kill the Jedi taking refuge inside . Layout . The Academy was designed to be serene and reflective , and served as the perfect center of Jedi training and coordination . The main building adhered to the common Jedi Temple theme of a ziggurat . The base was stepped in this style and culminated in a transparisteel block that was topped by an inverted pyramid . The main entrance to the Temple was located atop one of the four major stairs . The interior was constructed out of the same stone as the outside façade and there were many stairs leading off into dark hallways . Small squares were created to serve as the hub for foot traffic throughout the academy ; places where several hallways came together . A statue of Luke Skywalker was constructed in one of these halls , though it would be toppled during the Sith invasion . Classrooms and living quarters for the Jedi were located within the Temple ziggurat . Coupled with several other buildings , the academy was fit to house several hundred Jedi at a time . The dormitories around the academy were small one story buildings with twenty - five habitation units each . Initiates were placed into clans and slept in those groups within . During the GAG invasion , the initiates were kept in these buildings until rounded up in an outside pavilion . Between the two pyramids was a block of reflective transparisteel that housed the Garden Level . Similar to the Room of a Thousand Fountains on Coruscant , the room housed Ossan plants and waterfalls . After the conception of the Ossus Project , the room was used to test Yuuzhan Vong plant life and served as a base for Master Shaper Nei Rin and her assistants . The upper layers of the academy were housed within the inverted pyramid that rested above the Garden Level . The outer halls were lined with windows which provided 360 degree views of the surrounding geography . Also in the upper layers of the academy were several conference rooms and the Jedi Council chambers . Rectories and the offices of Jedi Masters were also known to fill the upper most levels . Upon the inverted pyramid ' s roof was a landing platform for larger vessels . As such , the visitor ' s quarters were located just below , so as not to intrude upon the Temple ' s student ' s daily routines . The roof served also as a place where older students were sent for the Meditation of Emptiness . During Cade Skywalker ' s meditation , he relived his first day after the massacre , and was visited by the forceful Force ghost of his ancestor Luke Skywalker , who commanded that he save fellow Jedi Hosk Trey ' lis . Near the top of the academy was the Rhysode Room , a formal meeting room for visiting delegates that departed from the Temple ' s typical simple and peaceful style of furnishing . When away from the Jedi Temple on Coruscant , Master Tionne Solusar ran the archives on Ossus . It was here that she could gather data and ancient relics , while still watching over the trainees . Although not as complete as the Jedi Archives at the main Temple ; it was complete enough for the young initiates of the Order to complete their assignments . It was here that Tionne would review information , research and compile her work that would ultimately wind up in the main Archives . Alema Rar was able to secretly access the archives during the GAG ' s invasion and found only limited information on her ship , a relic from the old Sith Empire . The main lecture hall was located on the same floor as the archives . Located within the academy grounds were a number of specialized buildings , paths and courtyards . Jedi Master Cilghal established a laboratory within the academy grounds , a winding and meandering path led to it know as the Crooked Way . Past shrubbery and vistas the path was designed to force visitors to slow down and concentrate on the gardens . Clarity Gate , a trapezoid shaped arch that fronted a courtyard decorated with a fountain formed the entrance to the grounds . As an entrance to the Academy , it was required for all visitors to stop and meditate before passing into the rest of the complex . Connected to the courtyard were many halls including that which led to the Academy administration building . Cilghal ' s lab was connected with the infirmary where she could study such things as the hive - mind effect that caused those infected to become Joiner s . It was a large chamber with several monitors that analyzed anything from bodily functions of a myriad list of different species to samples of alien fungus . Within a near - by cliff face was the Jedi academy ' s main hangar . The main flight control room was designed with a holoprojector in the center , with several control stations surrounding it . The hangar was supervised by non - Jedi Orame who oversaw all activities within the hangar . It was here that Luke Skywalker learned of Alema Rar ' s escape from Cilghal ' s lab , and later it would serve to help the invading GAG in their hunt for Jedi . The Temple ziggurat was also equipped with four landing pads that stretched out from the main structure for small craft to land on . Connected to the four main pillars holding up the inverted pyramid and surrounding the Garden Level , supplies and special equipment were deposited into the Temple via these pads . Surrounding the main structure of the academy , several training grounds were erected . Younglings were encouraged to practice Force leap s , and launch themselves over set obstacles , such as a three - meter cross ray . On the opposite side of such emplacements were repulsorpads that caught the younglings before they hit the ground . The younger students who could not partake in jumping exercises , played small games such as mind - tag with nerfs which developed persuasive abilities . On another platform , the eldest apprentices practiced deflecting live blaster bolts , an activity they would continue to practice when they were moved to the Jedi Temple on Coruscant . Closer to the main academy building , a sunken basin lined with a walkway served as a place to practice centering exercises . Apprentices would meditate in the basin while adults stood above on the walkway throwing insults , food , and balls down upon the children . Other versions existed , all with the same purpose . Fasting while others ate in front of them , and not laughing while relentlessly being tickled were some of the many tests used to train detachment . The largest and most complex field was set with traps , hazards , and obstacles for the game Skorch . Two teams of the oldest apprentices used rackets , the Force , and stun - blasters to pass jet - ball s between each other , avoiding being hit . An apprentice or knight served as referee who could cause one team great losses or wins . The rules for this game were arbitrarily decided by the opposing teams ; the purpose was to test the mediating and analytical thinking skills of the referee . Near Star Pond , a pavilion was erected for meditation close to the dormitories . It was here that Luke Skywalker meditated before addressing the entire Jedi Order at a Jedi Convocation . Down the Crooked Path was the Lecture hall , a simple hall with pale , wooden pillars . The hall was suited to hold two thousand , yet it was mostly vacant at the Conclave due to the Order ' s small numbers . The door behind the speaker ' s dais led down to archives where Luke met with individual Jedi regarding their commitment to the Order .