the Arabian peninsula into trade networks, resulting in far-ranging artistic influences. It seems probable that before around 4000 BC the Arabian climate was somewhat wetter that today, benefitting from a monsoon system that has since moved south. During the late fourth millennium BC permanent settlements began to appear, and inhabitants adjusted to the emerging dryer conditions. In southwestern Arabia (modern Yemen) a moister climate supported several kingdoms during the second and first millennia BC. The most famous of these is Sheba, the kingdom of the biblical Queen of Sheba. These societies used a combination of trade in spices and the natural resources of the region, including aromatics such as frankincense and myrrh, to build wealthy kingdoms. Mārib, the Sabaean capital, was well positioned to tap into Mediterranean as well as Near Eastern trade, and in kingdoms to the east, in what is today Oman, trading links with Mesopotamia, Persia, and even India were possible. The area was never a part of the Assyrian or Persian empires, and even Babylonian control of north-west Arabia seems to have been relatively short-lived. Later Roman attempts to control the region's lucrative trade were foundered. This impenetrability to foreign armies doubtless augmented ancient rulers' bargaining power in the spice and incense trade. Although subject to external influences, south Arabia retained characteristics particular to itself. The human figure is typically based on strong, square shapes, the fine modeling of detail contrasting with a stylized simplicity of form. Egypt Due to the highly religious nature of ancient Ancient Egyptian civilization, many of the great works of ancient Egypt depict gods, goddesses, and Pharaohs, who were also considered divine. The idea of order characterizes ancient Egyptian art. Clear and simple lines combined with simple shapes and flat areas of colour helped to create a sense of order and balance in the art of ancient Egypt. Ancient Egyptian artists used vertical and horizontal reference lines to maintain the correct proportions in their work. Political and religious, as well as artistic, order was also maintained in Egyptian art. To clearly define the social hierarchy of a situation, figures were drawn to sizes that were based not on their distance from the painter's perspective but on relative importance. For instance, the Pharaoh would be drawn as the largest figure in a painting no matter where he was situated, and a greater God would be drawn larger than a lesser god. Symbolism