Virgin of the Rocks
In 1482, Leonardo visited Milan where he stayed with Giovanni Ambrogio de Predis, Evangelista de Predis, and their four brothers, all of whom were artists of different kinds. Both Ambrogio and Evangelista are known for having collaborated with Leonardo in the painting of the "Virgin of the Rocks" for the altarpiece in the chapel of the Confraternity of the Immaculate Conception at the Church of San Francesco Grande in Milan.