An ancient, honored heritage within the hallowed halls of the Jedi Temple was the role of the Jedi Temple Guard. Reporting to Cin Drallig, head of security, the Temple Guards were anonymous sentinels plucked from the ranks of the Jedi as part of a Knight's ongoing commitment to the Order. A Jedi Temple Guard would disappear inside the formal robes and identity-concealing masks, the ultimate expression of emotional detachment required in service to a higher calling. Temple Guards carried imposing lightsaber pikes -- thick, double-bladed weapons that produced a rare and distinctive yellow blade.
At the heart of every Jedi lightsaber is a kyber crystal found on several planets, most notably the icebound caves of Ilum. This crystal is attuned to the Force, and connected to a Jedi Knight on a deeply personal level. In this way, a lightsaber is an extension of a Jedi's Force awareness. Because Jedi let the Force guide their selection of the crystal, the vibration that the crystal creates in the lightsaber blade helps Jedi center themselves and find balance in the Force. In this way, a Jedi can center his or her attention beyond the distractions of combat. A lightsaber crystal is colorless until first attuned and connected to a Jedi -- at which times it glows either blue or green, or in some rare instances, another shade. From that point on, it retains that hue.
Instantly recognizable by its distinctive crown of five spires, the Jedi Temple was the home of the Jedi Order on Coruscant. Part school and part monastery, the Jedi Temple was the central hub for all Jedi activities in the galaxy. When Supreme Chancellor Palpatine enacted Order 66, clone troops led by the newly risen Darth Vader attacked the temple, massacring its inhabitants and leaving the structure badly damaged. With the Empire triumphant, the Jedi Temple’s spires still rose into the Coruscant skies. But the building was now the Imperial Palace, home to the Sith Lord who had destroyed the Jedi.