Alexander Frey, KM, KStJ, is an American symphony orchestra conductor, virtuoso organist, pianist, harpsichordist and composer. Frey is in great demand as one of the world's most versatile conductors, and enjoys success in the concert hall and opera house, and in the music of Broadway and Hollywood. Leonard Bernstein referred to him as "a wonderful spirit".

The Berliner Ensemble is a German theatre company established by actress Helene Weigel and her husband, playwright Bertolt Brecht, in January 1949 in East Berlin. In the time after Brecht's exile, the company first worked at Wolfgang Langhoff's Deutsches Theater and in 1954 moved to the Theater am Schiffbauerdamm, built in 1892, that was open for the 1928 premiere of The Threepenny Opera.