Otto Muehl * (Grodnau 1925–2013 Moncarapacho, Portugal) “Massaker Bolognese”, monogrammed, dated M 83., 1.11., oil on canvas, 140 x 170 cm, framed (fixed to wooden rail along the edges) Provenance: Dorotheum, Vienna, auction: Modern and Contemporary Art, 19 May 1999, lot 240 Private Collection, Vienna