Joseph Benson's Commentary of the Old and New Testaments - Mark 15:16-19
Mark 15:16-19. And the soldiers led him away The soldiers, knowing that it was a Roman custom to scourge prisoners just before they were put to death, interpreted Pilate’s order on this head as a declaration that he was immediately to be crucified; therefore they led him to the hall, called the Pretorium As being the place where the pretor, a Roman magistrate, used to keep his court, and give judgment; but in common language, the term was applied to the palace in general. And they call... read more
Albert Barnes' Notes on the Whole Bible - Mark 15:17
With purple - Matthew says scarlet. See the notes at Matthew 27:28.About his head - In the form of a garland or diadem. The whole head was not covered, but it was placed in a circle round the temples. read more