Darth Sidious's lightsabers

Darth Sidious's lightsabers were a pair of nearly identical lightsabers built by Darth Sidious, during his apprenticeship under Darth Plagueis. Sidious rarely used his weapons—only doing so when absolutely necessary—as they would have immediately identified him as a Sith Lord. Instead, he preferred to exercise his powers of manipulation and used servants to carry out his hidden agenda.

Specifications
Darth Sidious had discerning tastes, which was reflected in his lightsabers. They were constructed from nearly indestructible phrik with a flat aurodium blade emitter, and all finished with electrum. The weapons utilized a synth-focusing crystal, known as Sith crystals, at their cores.

While both were originally identical, one of them was later retrofitted with an unknown black material.

One of the weapons was normally hidden inside a neuranium sculpture that was displayed on the desk of his office within the Senate Office Building on Coruscant.

History
Near the end of the Clone Wars, Palpatine had an extended confrontation with Windu. The Jedi guided the battle towards the bay window of Palpatine's office and out onto the wind-blown ledge outside. Windu disarmed the Sith Lord with a surgically precise kick to the face, throwing Palpatine off-balance and causing the Sith Lord to drop his lightsaber as he flailed for purchase. The lightsaber fell out the window into the bottomless streets and alleyways of Coruscant below just before Skywalker showed up. Consequentially, it also forced him to only rely on one lightsaber.

After Obi-Wan Kenobi and Yoda realized what had happened, Yoda went to face the Emperor personally at the Senate Building, while Kenobi headed off to kill Darth Vader. Yoda surprised Palpatine, who told him that his arrogance blinded him and that his apprentice would be more powerful than both of them. Yoda answered Palpatine that his faith in Vader was a mistake along with his faith in the dark side. Yoda dueled Sidious, who had already retrieved his other weapon and placed it in his sleeve. The duel brought them to the Galactic Senate Chamber, the heart of the Senate. Sidious hurled Senate pods at Yoda, and the effort to avoid them exhausted the Jedi Master. Sidious then blasted Yoda with Force Lightning, but with the last of his strength the Jedi master repelled it enough to send both himself and Sidious over the pod's edge. Palpatine was able to hold on to a senate pod, while Yoda fell to the senate floor, leaving only his cloak. With Bail Organa's help, Yoda fled the Senate Building and would go into exile.

Darth Sidious would once again use his lightsaber and fought alongside his apprentice against a swarm of lyleks.

Appearances

 * Star Wars: Darth Maul&mdash;Son of Dathomir 4
 * Star Wars: Episode III Revenge of the Sith
 * Lords of the Sith
 * Star Wars: Darth Maul&mdash;Son of Dathomir 4
 * Star Wars: Episode III Revenge of the Sith
 * Lords of the Sith