Nesebar (Bulgarian: Несебър, variously transliterated), previously known as Mesembria (Greek: Μεσημβρια) and before that as Menebria, is an ancient city on the Black Sea coast of Bulgaria, located in Nesebar municipality, Burgas Province.
In modern times, Nesebar is a major tourist attraction in what has become a popular area with several large resorts—the largest, Sunny Beach, is situated immediately to the north of Nesebar.
Nesebar has on several occasions found itself on the frontier of a threatened empire, and as such it is a town with a rich history. The ancient part of the town is situated on a peninsula (previously an island) connected to the mainland by a narrow man-made isthmus, and it bears evidence of occupation by a variety of different civilisations over the course of its existence. Its abundance of historic buildings prompted UNESCO to inscribe Nesebar on its list of World Heritage Sites in 1983.