The archaeological study of the Nessebur peninsula and its aquatory done during the last four decades revealed rich collections of significant cultural monuments illustrating the history of ancient Messambria and medieval Nessebur. A large part of them are present exhibits in the new Nessebur archaeological museum. The museum exhibition area includes a foyer and four halls. The UNESCO Diploma, certifying the Ancient Nessebur registration on the world cultural heritage list in 1983, can be seen in the foyer.