The 50 cent coin features a relief image of the Madara Horseman – an eighth-century rock carving and UNESCO World Heritage Site. The horseman faces right, spearing a lion – a powerful symbol from Bulgaria’s past.
The design also includes the year of issuance, the inscription “БЪЛГАРИЯ” (the country’s name in Bulgarian) and the word “СТОТИНКИ” (“CENT”) in Cyrillic script. (Source: ecb.europa.eu)