False pair of Italian walnut chairs, one smaller (118×47) from the 17th century, the other slightly larger (124×46) from the 18th century. Both have the same decoration “a Certosina”, a kind of mosaic created from pieces of wood, mother-of-pearl, bone, or ivory. This technique, widely used in the Italian Renaissance, is named after the convent of Certosa, near Pavia, where it was first used to decorate an altarpiece.