While researching materials for the Italian translation of Nietzsche's complete works in the 1960s, the philologists Giorgio Colli and Mazzino Montinari decided to go to the Archives in Leipzig to work with the original documents. From their work emerged the first complete and chronological edition of Nietzsche's writings, including the posthumous fragments from which Förster-Nietzsche had assembled "The Will To Power". The complete works comprise 5,000 pages, compared to the 3,500 pages of the "Großoktavausgabe". In 1964, during the International Colloquium on Nietzsche in Paris, Colli and Montinari met Karl Löwith, who would put them in contact with Heinz Wenzel, editor for Walter de Gruyter's publishing house. Heinz Wenzel would buy the rights of the complete works of Colli and Montinari (33 volumes in German) "after" the French Gallimard edition and the Italian Adelphi editions.