The small size of this beautifully made altarpiece, used as an aid to prayer and meditation, meant that it was easily portable and could be taken on journeys. The open wings reveal an image of Christ's Crucifixion flanked by smaller scenes. The choice of subjects must have had special significance for the patron. On the left are the Nativity and the Crucifixion of St Peter (he was crucified upside down). Opposite, and rather unusual in a wing, are The Enthroned Virgin and Child with Saints and St Nicholas donating the Dowries (thereby allowing an impoverished nobleman's daughters to marry).