early life and training giovanni battista castello, an italian historical painter, was born in gandino near bergamo in 1500. he is known as il bergamasco to distinguish him from another painter with the same name from genoa. castello's early life and training are not well-documented, but it is believed that he apprenticed with aurelio buso of crema, a pupil of polidoro da caravaggio. artistic career castello's best-known works include paintings on the vault of the basilica della santissima annunziata del vastato. he was also an architect and sculptor, and his work can be found in various loca…