Belgrad Castle, also known as Byalgrad meaning "white fortress," stands eight kilometers from the village Gugutka in Haskovo Province, southeastern Bulgaria, representing a significant example of medieval fortification. Built in the 12th century, the fortress retains its best-preserved keep with walls reaching 8 meters high and 2 meters thick, constructed from the bright limestone that inspired its name. Reconstructed during Ottoman rule, Byalgrad survived centuries of regional conflict and cultural change, standing today as an important historical monument that embodies Bulgaria's medieval heritage and architectural legacy in the broader Balkan region.
