On Wikipedia https://en.wikipedia.org/wiki/National_Opera_and_Ballet_of_Bulgaria
Alternative Spellings National Opera Chorus
Creation 1890
City Sofia, Bulgaria
Country Bulgaria

The first opera company in Bulgaria was founded in 1890 as part of the Capital Opera and Drama Company. The two sections split in 1891 to form the Salza i Smyah theatrical company and the Capital Bulgarian Opera. It was, however, disbanded the next year due to lack of government funding and financial difficulties. wikipedia