description of project International Scientific Committee authors online chapter photo gallery The dawn of civilization:  earliest times to 700 B.C. The development of sedentary and nomadic civilizations: 700 BC to A.D. 250. The cross-roads of civilizations: AD 250 to 750 The age of achievement AD 750 to the end of the fifteenth century (Part I & Part II) Development in contrast: from the sixteenth to the mid-nineteenth century Towards contemporary civilization: from the mid-nineteenth century to the present time