Ancient City of Nessebur- Bulgaria

Nesebar is an ancient town and one of the major seaside resorts on the Bulgarian Black Sea Coast, located in Burgas Province. It is the administrative centre of the homonymous Nesebar Municipality. Often referred to as the "Pearl of the Black Sea" and "Bulgaria's Dubrovnik", Nesebar is a rich city-museum defined by more than three millennia of ever-changing history. It is a one of the most prominent tourist destinations and seaports on the Black Sea, in what has become a popular area with several large resorts—the largest, Sunny Beach, is situated immediately to the north of Nesebar.(Wikipedia)

Thanks Fidel for this wonderful card:)