Archaeologic excavation of Nerik, the religious center of the Hittite empire. In the 2nd millenium B.C. the Hittites ruled an empire that reached from western Turkey to the borders of Egypt. Even without archaeological experience structures which belong together are clearly visible. Big stones next to each other, walls of mudbricks, different coloured soil etc. are asking many questions to the archaeologist. What belongs together? What is older, what younger? In general the youngest layer is on the top and the oldest one must be the deepest. But all the layers are disturbed and create new questions. An excavation is like a three dimensional puzzle with an unknown amount of existing and missing parts.