"Exploring the Eroica" is the name of the essay with which the editor made herself known back in 1998 and which contributed decisively to the research into the complex transmission. Written in 1803, the autograph of the work is lost today. The title "Sinfonia Eroica" is already found in the first edition (but only there as well). The main source of the edition is the copy of the score, which was carefully examined and emended by Beethoven, and into which he made corrections even after the appearance of the first printed set of parts. In addition, the copies of the parts used for first performances (before publication) as well as the extremely error-filled first edition of the instrumental parts are also relevant; more so, however, is another printed set that Beethoven personally revised. Thanks to the new performance material, the musical text of the new Beethoven