Waldemar Januszczak uncovers the secret meanings hidden within Marcel Duchamp's Fountain, a readymade sculpture consisting of a porcelain urinal signed R Mutt.

Waldemar Januszczak uncovers the secret meanings hidden within The Garden of Earthly Delights by Hieronymus Bosch.

Waldemar Januszczak uncovers the secret meanings hidden within The Polish Rider by Rembrandt, which depicts a young man traveling on horseback through a murky landscape.