Praetorium.
Description
Herod's Palace at Jerusalem was built in the last quarter of the 1st century BC by Herod I the Great, King of Judea from 37 BC to 4 BC. It was the second most important building in Jerusalem, after the Temple itself. [Wikipedia]
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Place Jesus was Condemned to Crucifixion by Pontius Pilate! New Via Dolorosa! Praetorium
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Dictionary information
Praetorium
The Greek word (praitorion) thus rendered in (Mark 15:16 ) is rendered "common hall" [(Matt 27:27 ), marg., "governor's house"], "judgment hall," (John 18:28 ; 18:33), marg., "Pilate's house", (John 19:9 ; Acts 23:35 ), "palace" (Phil 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.
EBD - Easton's Bible Dictionary