Evidence of human habitation in today’s Bulgaria could be traced back to the Middle Paleolithic Period (100 000 to 40 000 years BC). It is in Bulgaria that archeologists found the oldest prehistoric town in Europe dating between 4 700 and 4 200 BC. It is in Bulgaria that the world’s oldest golden treasure was discovered which belongs to cultures living on this territory around 6 000 BC. It is again in Bulgaria that one finds Europe’s oldest continuously inhabited city – the ancient Plovdiv where the first citizens populated the city more than 6 000 years ago.
Having such a long history and culture of human settlements is a prerequisite for the existence of numerous cultural heritage sites in Bulgaria. Indeed, the territory of Bulgaria is covered with remains from the different cultures that lived and developed here – Thracians, Romans, Greeks, Slavs, Byzantines, Ottomans, Bulgarians…Bulgaria hosts 8 UNESCO world heritage sites, as well as 12 UNESCO biosphere reserves.