His initial pictorial style may be considered as derived mainly from the old Milanese school,[2] which had imbibed the classic influence of Leonardo and pupils such as Bramantino.
The chapels are dispersed over a hilltop sanctuary, connected by a winding path, and containing a combination of diorama and wax museum[3] with life-size terracotta figures.
[4] He executed his most memorable work, a fresco of the Crucifixion (pictured right), with a multitude of figures, no less than twenty-six of them being modelled in actual relief, and coloured; on the vaulted ceiling are lamenting angels.
[5] There are other works which show flashes of innovation such as the crowded chorus decorating duomo of Santa Maria dei Miracoli in Saronno or his fresco of St Anne.
[2] Andrea Solari, Giovan Battista della Cerva, Gian Paolo Lomazzo, and Fermo Stella were his principle students.