In January 1917 Emperor Karl I attended a military conference at Schloss Pless with German Kaiser Wilhelm II and members of the German Army and Navy. Haus, along with members of Austria-Hungary's naval command at Pola, accompanied the Emperor to this conference in order to discuss naval operations in the Adriatic and Mediterranean for 1917. Days after returning from this conference, Grand Admiral Haus died of pneumonia aboard his flagship "Viribus Unitis" on 8 February 1917. Newly crowned Karl I attended his funeral in Pola.