'Castle' in the Bible

And some shouted one thing, some another, among the crowd: and when he could not know the certainty for the uproar, he commanded him to be brought into the castle.

And as Paul was about to be brought into the castle, he saith unto the chief captain, May I say something unto thee? And he said, Dost thou know Greek?

the chief captain commanded him be brought into the castle, bidding that he should be examined by scourging, that he might know for what cause they so shouted against him.

And when there arose a great dissension, the chief captain, fearing lest Paul should be torn in pieces by them, commanded the soldiers to go down and take him by force from among them, and bring him into the castle.

But Paul's sister's son heard of their lying in wait, and he came and entered into the castle and told Paul.

But on the morrow they left the horsemen to go with him, and returned to the castle: