After the fall of the Soviet Union, the construction was abandoned and its works of art severely damaged by vandalism.
He told Euronews he was disgruntled by the "lipservice" he said the government paid to enacting real change in a country that has been labelled "the black sheep of the European Union" by Reporters Without Borders.
Biggest demonstrations so far in nearly two months of anti-government rallies
Bulgaria's storied location between East and West has given it plenty of Instagram-ready sights, but this is a soulful and quietly cosmopolitan land too, steeped in traditions that invite you to power down for a bit and savor the moment.
Thermal springs and mud therapy on Bulgaria's Black Sea coast
Tsarevets Fortress: Euronews visits Bulgaria's City of the Tsars, the heart of the second Bulgarian empire and now a popular tourist attraction
Roses and gold, forest green and sparkling azure blue, and after the first snows the gleam of bright white: for every season in Bulgaria there are captivating colors and unforgettable experiences to match.
A postcard from Vitosha Mountain: Bulgaria's year-round nature escape
Demonstrators have taken to the streets with the same demands for a month — they want the country's entire cabinet to resign and elections to be held.
If Bulgaria's natural beauty is one of Europe's best-kept secrets, its strategic location between East and West has also placed it at the crossroads of many intersecting civilizations over thousands of years and that has endowed the country with a truly exhilarating array of cultural treasures.