Definition: Rietveld refers to a medieval guild of artisans, makers, and weavers who produced decorative textiles for the high-status nobility of England. The term "Rietveld" was originally used by the Roman Catholic Church in medieval times to refer to a style or design for church altarpieces, particularly those painted with gold leaf. The word itself translates to "stained glass". It refers to stained glass windows that are decorated with intricate designs and colors created from gold leaf. The term Rietveld also carries connotations of high-quality craftsmanship, artistry, and beauty in stained glass.