To date, the works of the great Romantic composer Franz Liszt (1811-1886) have not been published in an entire complete edition. However, shortly after Liszt's death, the project of a complete edition of his works was started for the first time: The Franz Liszt Foundation, founded in Weimar in 1888 under Grand Duke Carl Alexander von Sachsen-Weimar-Eisenach, had set itself the goal of publishing a complete edition in the following decades. However, the so-called 'Carl Alexander Edition', divided into seven groups of works, was never completed. In the period from 1907 to 1936 a total of 34 volumes were published under different editors, most of whom were among Liszt's students (including Eugen d'Albert, Ferruccio Busoni, José Vianna da Motta, Bernhard Stavenhagen and Peter Raabe). Each volume contains a preface and a critical apparatus. After 1936 the edition was discontinued and thus remained incomplete. In this form it contains a large part of Liszt's musical output, including the most important of his major works (orchestral works, piano works, songs). On the other hand, the oratorios, the opera, the organ works, a number of choral works, the piano compositions for four hands, several piano arrangements and some works for piano and orchestra are missing. Nevertheless, the Carl Alexander Edition still represents Liszt's most comprehensive edition of his works, since the 'New Liszt Edition' (ed. Imre Sulyok), which has been published since 1970, has so far only been completed in the field of piano music for two hands. We present the 34 volumes of the Carl Alexander Edition (including the double volume 8/9) from the BSB's music collection in digitalized form, supplemented by the two oratorios 'Die Legende von der heiligen Elisabeth' and 'Christus' in the first editions. The collection is captured by OMR (Optical Music Recognition). The musical content can be searched by using musiconn.scoresearch.