Original: Repertoire Szell mainly stuck to conducting the core Austro-German classical and romantic repertoire , from Haydn , Mozart and Beethoven , through Mendelssohn , Schumann and Brahms , and on to Bruckner , Mahler and Strauss .
Simplified: He conducted music by the main central-European composers : Haydn , Mozart and Beethoven , Mendelssohn , Schumann and Brahms , Bruckner , Mahler and Strauss .