Answer:
Narrow embroidered band forming part of the drapery of a canopy bed. The term cantonniere refers to a type of decorative treatment or accessory used in interior design, specifically in relation to window treatments. It originated in France during the 18th century and is typically used to describe a type of decorative cornice or valance that is installed above a window to conceal curtain rods or hardware. Cantonnieres are often made of fabric, featuring intricate embellishments such as embroidery, tassels, or fringe to enhance the overall aesthetic of the window treatment. They can be used alone or in combination with other window coverings, such as curtains or blinds.