King James Bible Dictionary

The Greek word (praitorion) thus rendered in Mark 15:16 is rendered "common hall" (Matthew 27:27, marg., "governor's house"), "judgment hall," (John 18:28, 33, marg., "Pilate's house", 19:9; Acts 23:35), "palace" (Philippians 1:13). This is properly a military word. It denotes (1) the general's tent or headquarters; (2) the governor's residence, as in Acts 23:35 (R.V., "palace"); and (3) the praetorian guard (See PALACE), or the camp or quarters of the praetorian cohorts (Acts 28:16), the imperial guards in immediate attendance on the emperor, who was "praetor" or commander-in-chief.

(in the Revised Version translated palace ,) (Matthew 27:27; John 18:28,33; 19:3) the headquarters of the Roman military governor, wherever he happened to be. In time of peace some one of the best buildings of the city which, was the residence of the proconsul or pr'tor, was selected for this purpose. Thus at C'sarea that of Herod the Great was occupied by Felix, (Acts 23:35) and at Jerusalem the new palace erected by the same prince was the residence of Pilate. After the Roman power was established in Judea, a Roman guard was always maintained in the Antonia. The pr'torian camp at Rome, to which St. Paul refers, (Philemon 1:13) was erected by the emperor Tiberius, acting under the advice of Sejanus. It stood outside the walls, at some distance short of the fourth milestone. St. Paul appears to have been permitted, for the space of two years, to lodge, so to speak, "within the rules" of the pr'torium, (Acts 28:30) Although still under the custody of a soldier.