X international Choir Festival "Chernomorski zvutsi" presentation X international Choir Festival "Chernomorski zvutsi", Balchik, Bulgaria - Opening X International Choir Festival "Chernomorski zvutsi" - Sofia stage X International Choir Festival Chernomorski zvutsi, Balchik, Bulgaria - 3 June 2021 X International Choir Festival "Chernomorski zvutsi" - Plovdiv stage X International Choir Festival "Chernomorski zvutsi", Balchik, Bulgaria - 4 June 2021 X international Choir Festival "Chernomorski zvutsi". Stage "Nimfeum" concert - Architectural-Park Complex “The Palace” X international Choir Festival "Chernomorski zvutsi", Balchik, Bulgaria - Gala Concert - 5 June