English summary: The 11th volume of the series Die handschriftliche Uberlieferung der Werke des Heiligen Augustinus, edited by the Church Fathers Commission at the Austrian Academy of Sciences, lists all medieval manuscripts kept nowadays in Russia, Slovenia, and Hungary which contain genuine works of Augustine or spurious ones ascribed to him. The material is presented in two catalogues, one ordered by works, one by libraries. Part 1 (Werkverzeichnis)...