MA [Today] reflects the heterogeneity of theater after World War I and its 1924 special issue is a comprehensive document of the avant-garde ambition to renew mise-en-scène. Although MA was not a theater journal, it regularly published dramatic texts, performance reviews and manifesto-like essays on recent forms of staging. László Moholy-Nagy supported MA and its editor Lajos Kassák from Berlin, where he got involved in staging contemporary plays and operas. This paper addresses the question why the performing arts were especially important for Kassák’s circle and examines the relationship of MA to avant-garde theater movements. It also gives a brief survey of the Musik und Theaternummer with its introduction by Kassák before engaging with the theory and practice of experimental theater in Moholy-Nagy’s oeuvre.