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…