Yazılıkaya rock sanctuary near Ankara depicts more than 90 figures carved into limestone walls Lesser gods are seen marching toward the sun-goddess Hebat and the storm-god Teshub, the supreme deities Archaeologists believe the figures function as an ancient calendar, tracking the lunar cycles and the passing months They also explain the Hittite cosmos, divided into Earth, sky and the Underworld The reliefs were uncovered in 1834 but only now is their purpose clear