рукомойник - церковь Нового завета;
книга - Божественная мудрость;
лилия - чистота.
Campin's fascination with the natural and domestic world dominates his telling of the sacred story. He meticulously renders even the smallest details in an innovative technique combining translucent oil overlay on water-based opaque pigments. The resulting optical effects enhance Campin's interpretation of the Virgin's private chamber as an affluent 15th century interior filled with household appointments and goods similar to those that the patron would have known. Yet Campin was essentially guided in his choice of objects by the symbolic needs of the story. The brass laver, for example, signifies Maria's purity, as does the Madonna lily in the maiolica pitcher.
http://www.abcgallery.com/C/campin/campin12.html - левая створка и центр