the Hellenistic period was the addition of a courtyard to the home. Courtyards served as a light source for the home as Greek houses were closed off from the outside to maintain a level of privacy. There have been windows found at some home sites, but they are typically high off the ground and small. Because of the issue of privacy, many individuals were forced to compromise on light in the home. Well-lit spaces were used for entertaining or more public activity while the private sectors of the home were dark and closed off which complicated housework. Courtyards were typically the focus of the home as they provided a space for entertaining and a source of light from the very interior of the home. They were paved with cobblestones or pebbles most often, but there have been discoveries of mosaicked courtyards. Mosaics were a wonderful way for the family to express their interests and beliefs as well as a way to add décor to the home and make it more visually appealing. This artistic touch to homes at Olynthus introduces another element of civilized living to this Hellenistic society. Pergamon Pergamon in particular is a characteristic example of Hellenistic architecture. Starting from a simple fortress located on the Acropolis, the various Attalid kings set up a colossal architectural complex. The buildings are fanned out around the Acropolis to take into account the nature of the terrain. The agora, located to the south on the lowest terrace, is bordered by galleries with colonnades (columns) or stoai. It is the beginning of a street which crosses the entire Acropolis: it separates the administrative, political and military buildings on the east and top of the rock from the sanctuaries to the west, at mid-height, among which the most prominent is that which shelters the monumental Pergamon Altar, known as "of the twelve gods" or "of the gods and of the giants", one of the masterpieces of Greek sculpture. A colossal theatre, able to contain nearly 10,000 spectators, has benches embedded in the flanks of the hill. Sculpture Pliny the Elder, after having described the sculpture of the classical period notes: Cessavit deinde ars ("then art disappeared"). According to Pliny's assessment, sculpture declined significantly after the 121st Olympiad (296–293 BC). A period of stagnation followed, with a brief revival after the 156th (156–153 BC), but with nothing to the standard of the times preceding