period: 1) Raphael's " The Madonna of the Meadow " 2) Hieronymus Bosch's " The Garden of Earthly Delights ". 3) Piero Della Francesca's " Baptism Of Christ ".   RENAISSANCE SECRETS - SERIES 2 29 Oct - 19 November 2004 (4 x 30 min) / BBC2 (Open University). A series of outstanding