The Ancient City of Nessebar is a unique example of an architectural ensemble with preserved Bulgarian Renaissance structure, and forms a harmonious homogenous entity with the outstanding natural configuration of the rocky peninsular, linked with the continent by a long narrow stretch of land. Its nature and existence is a result of synthesis of long-term human activity, which has witnessed significant historic periods - an urban structure with elements from 2nd millennium BC, classical antiquity, and the Middle Ages; the development of medieval religious architecture with rich plastic and polychrome decoration on its facades in the form of ceramic ornamentation typical for the period; the different stages in the development of the characteristic residential vernacular architecture, which testify to the supreme mastery of the architecture of the Balkans as well as the East Mediterranean region. The vernacular architecture of the urban ensemble, dominated by medieval churches and archaeology, together with the unique coastal relief, combine to produce an urban fabric of the high quality.