The senior-most of the twelve justices serving on the Old Republic's Supreme Court held the title of Chief Justice. Consequently, this individual presided over both the Supreme Court itself and the judicial arm of the Republic's government.
In 32 BBY, an unidentified male held the position of Chief Justice; he presided over the corruption trial of Finis Valorum shortly before the Invasion of Naboo took place.
The position of Chief Justice was superseded by that of the [First Justice] (/article/first_justice) within the Court of Justice of the New Republic.
Uved Pledesin held the role of Chief Justice within the Galactic Alliance Court of Justice in 43.5 ABY.