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 from 1503 and 1504, when Bosch was about 50 years old, it is his best-known and most ambitious work. Bosch's 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 and heretical 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.