 Subsequently, he was engaged by Ludovico Sforza, Duke of Milan, to paint a room in the Castello Sforzesco of that city.Also with Butinone, he frescoed the Grifi Chapel in the church of San Pietro in Gessate.After circa 1500, Zenale seemed to abandon the Ferrarese-expressionist style of Butinone, a strong influence from Leonardo da Vinci starting to appear in his works.