The Lost Twenty were memorialized with bronzium busts in the First Hall of the Jedi Temple.
"Only twenty Jedi have ever left the Order." "The Lost Twenty. And Count Dooku was the most recent and the most painful. No one likes to talk about it. His leaving was a great loss to the Order."
The Lost Twenty, earlier known as The Lost, was the name given to the Jedi Masters who had voluntarily resigned their commission and left the Jedi Order over ideological differences.
Thracia Cho Leem, the Master of Vergere, was not counted among the Lost, despite leaving the Order as a Jedi Master. The reasons for this are unknown.
Along with the most venerable Masters, the Lost were remembered in the form of busts in the Jedi Archives; a reminder of the Jedi's greatest failures, though the Jedi did not fault the individuals for leaving, regarding the statues as a reminder that the Jedi were not perfect and that sometimes they might fail to provide what a Knight might seek out of life. On each bust's pedestal, the great deeds of the Master it commemorated were listed, though it gave no mention of why he or she left the Order.[1]