© Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn ich kenne kein Weekend (I Know No Weekend) Joseph Beuys Accession Date: 05/01/06 Accession Number: F-BEUYS-106.045.1-.4a-s 1971-72 sauce bottle and book by Kant, Kritik der reinen Vernunft (Critique of Pure Reason), mounted in briefcase Overall, opened: 22 7/8 x 26 1/4 x 24