The grotto is built up from irregular stone blocks, with an olive tree curling around the right side, its leaves and fruit picked out. Mary kneels in a lilac veil over a rose gown with her hands joined; Joseph, in a red cloak, holds a lantern with a lit candle. The Child lies on straw in the manger and the head of an ox shows behind it. A jug, a bowl and a small fire sit at the front edge, while a gilded comet rides above the roof.