Madonna and Child with Sts Petronius, John the Evangelist and Client Alberto de Cattanei (Pala dei Mercanti), by Francesco Del Cossa, 1474, 15th Century, tempera on canvas, cm 227,5 x 267 . Italy, Emilia Romagna, Bologna, National Picture Gallery. From the Academy of Fine Arts, formerly in the Foro dei Mercanti. All. Madonna Child St Petronius miter pastoral cope St John Evangelist Gospel client Alberto de Cattanei throne risers fruit niche caisson frieze inscription Annunciation archangel lily Virgin Our Lady blue red white beige.