In 1968 Baltsa made her first appearance as "Cherubino" ("Le Nozze di Figaro", Mozart) at the Frankfurt Opera, followed by Octavian (Der Rosenkavalier, R. Strauss) at the Vienna State Opera in 1970. She was one of the youngest Ocativians ever at the Vienna State Opera.
From that year on, her career developed rapidly: the Deutsche Oper Berlin, various opera houses in the United States (among which the Metropolitan Opera in New York), the Bavarian State Opera (München), Govent Garden, Zürich, the Paris Opera etc. Under the guidance of Herbert von Karajan, she was a regular guest at the Salzburger Festspiele. But she is, of course, most famous for her performance of "Carmen" (Bizet), a role she has sung with José Carreras, Placido Domingo and Niel Shicoff many times.Agnes Baltsa performs alongside the Athens Experimental Orchestra conducted by Stavros Xarhakos for this recording songs from her Greek heritage.
Composers include Manos Hadjidakis, Mikis Theodorakis, Stavros Xarhakos and Vasilis Tsitsanis.