The Garden of Earthly Delights, Heironymus Bosch

The Garden of Earthly Delights (or The Millennium) is a triptych painted by the early Netherlandish master Hieronymus Bosch (c. 1450–1516), housed in the Museo del Prado in Madrid since 1939. Dating between 1503 and 1504, when Bosch was about 50 years old, it is his best-known and most ambitious work. The masterpiece reveals the artist at the height of his powers; in no other painting does he achieve such complexity of meaning or such vivid imagery. The triptych depicts several Biblical scenes on a grand scale and as a "true triptych", as defined by Hans Belting, was probably intended to illustrate the history of mankind according to medieval Christian doctrine.

The triptych is painted in oil and comprises a square middle panel flanked by two rectangular wings that can close over the center as shutters. These outer wings, when folded shut, display a grisaille painting of the earth during the Creation. The three scenes of the inner triptych are probably intended to be read chronologically from left to right. The left panel depicts God presenting to Adam the newly created Eve, while the central panel is a broad panorama of sexually engaged nude figures, fantastical animals, oversized fruit and hybrid stone formations. The right panel is a hellscape and portrays the torments of damnation.

Art historians and critics frequently interpret the painting as a didactic warning on the perils of life's temptations. However the intricacy of its symbolism, particularly that of the central panel, has led to a wide range of scholarly interpretations over the centuries. 20th-century art historians are divided as to whether the triptych's central panel is a moral warning or a panorama of paradise lost. American writer Peter S. Beagle describes it as an "erotic derangement that turns us all into voyeurs, a place filled with the intoxicating air of perfect liberty".

During his life, Bosch painted three large triptychs in which each panel was essential to the meaning of the whole. Each of these three works presents distinct yet linked themes addressing history and faith. Triptychs from this period were generally intended to be read sequentially, the left and right panels often portraying Eden and the Last Judgment respectively, while the subtext was contained in the center piece. It is not known whether "The Garden" was intended as an altarpiece, but the general view is that the extreme subject matter of the inner center and right panels make it unlikely that it was intended to function in a church or monastery, but was instead commissioned by a lay patron.