The cabinet housing the relics of the Passion. On the top are, left to right, St. Thomas the Apostle's finger, pieces from the flagellation whip, thorns from the crown of thorns. In the middle are the fragments of the Cross itself. On the bottom is a nail, and part of the inscription that hung over the top of the Cross of Christ (the Greek portion). On the left, standing upright, is the crossbeam from the cross of the Good Thief I think.