Triangle with an allegory on art education. On the middle panel a nursery; A woman breasts a child. She sat at a table, the crib and a basket for her on the floor. From the ceiling hangs a chandelier, on the wall the stuffed head of a deer. In the background, a dentist. The nursery symbolizes nature. The left side panel shows an evening school where the light of candles and lantern writing is taught. The school symbolizes education. On the right side panel, a scholar in his study cuts a pen at the light of the candle. The pencil cutter symbolizes exercise. (for the centre and left side panel see SK-A-2320-A/B)