This semi-postal from the Netherlands features a richly detailed depiction of a medieval schoolroom relief, showing a master teaching a lively group of children. Issued to raise additional funds (25c surcharge) for social or cultural causes, it is part of the Netherlands' long tradition of charity stamps. The intricate artwork, based on historical sculptural carvings, highlights Dutch educational heritage and medieval craftsmanship. A desirable item for thematic collectors of art, sculpture, education, and semi-postals.