The Slovakian soprano Luba Orgonasova sings at all the major opera houses of the world and numbers among the most sought-after interpreters of the lyrical and coloratura parts of opera and concert literature. She was one of the last discoveries of Herbert von Karajan: she sang the part of Marzelline (Fidelio) at the Salzburg Festival in 1990, which marked the beginning of her rapid rise to celebrity. The Mozarteum Orchestra Salzburg has been the orchestra of the city and Land of Salzburg since 1958 and regularly concertizes at the Salzburg Festival and the Mozartwoche. The principal conductor is the Dutch-born Hubert Soudant, who led the Nouvel Orchestre Philharmonique de France in Paris from 1981 to 1983 and the Utrecht Symphony Orchestra from 1983 to 1986. In addition to his activities in Salzburg, Soudant is also the principal conductor of the Orchestra and Opera des Pays de Loire in Nantes and Angers, France.