The twentieth annual meeting of the Symposium on Mediterranean Archaeology (SOMA) was held in Saint-Petersburg, Russia on 12-14 May 2016. As in the past, the symposium provided an important opportunity for scholars and researchers to come together and discuss their works in a friendly and supportive atmosphere. The main theme of the 2016 meeting is the archaeology of the Northern Black Sea. The Northern Black sea region is an area rich in archaeological sites, on the one hand, and subject to active industrial development, a rapidly growing population and the development of port and recreational facilities on the other, with an attendant growth of pollution and waste. Therefore, in addition to traditional issues related to archaeological finds in various parts of the Mediterranean, the papers focus on new ideas for the conservation and management of sites of historical and cultural heritage.