The period of the 3rd, the 2nd, and the 1st millennia bce was a time of drastic change in Europe. This has traditionally been defined as the Metal Ages, which may be further divided into stages, of approximate dates as shown: the Bronze Age (2300–700 bce) and the Iron Age (700–1 bce), which followed a less distinctly defined Copper Age (c. 3200–2300 bce). At this time, societies in Europe began consciously to produce metals. Simultaneous with these technological innovations were changes in settlement organization, ritual life, and the interaction between the different societies in Europe. These developments and their remarkable reflections in the material culture make the period appear as a series of dramatic changes.
Andy Warhol turned to his most notable style—photographic silkscreen printing—in 1962. This commercial process allowed him to easily reproduce the images that he appropriated from popular culture.
