Postglacial Black Sea level rising, urban development and adaption of historic places. The case-study of the city-peninsula of Nesebar (Bulgaria)

The strengthening of a coastal zone considers complex hydrodynamic factors (waves, currents, wind and materials carried by them), climate, rock stability, sedimentation eustatic fluctuations at sea level. terrace on which the urban structures Nessebar are located is formed almost horizontal Miocene limestone sandstones, marl lime stones clays. It limited steeply abraded coast, subjected to destructive energy surf until end last century. destruction ancient early Byzantine constructions can be identified along slope sea-cliff between 8th 13th isohypses coastline seabed least 4th isobath. In process tracing fortifications, not followed, but rather proximity base peninsular slope.