The Greek Praetorium: The Prison of Christ
These grottos are situated to the West of the Ecce Homo Church and are referred to as the Apostle Peter’s prison, as it is believed that Peter was imprisoned here. It is also referred to as the prison of Barabas the thief. There is also a chance that Jesus himself was imprisoned in these grottoes. http://www.biblicalproductions.com/articles_via_dolorosa.htm