We are really getting into it now.
From this Sunday, traditionally called 1st Sunday of the Passion, it is customary to veil images in churches. In the Gospel in traditional Form of the Roman Rite we hear:
Tulérunt ergo lápides, ut iácerent in eum: Iesus autem abscóndit se, et exívit de templo. … They therefore took up stones to cast at Him; but Jesus hid Himself, and went out from the temple.