Wagner The Ring of the Nibelung Seattle OperaOriginal vintage advertising poster published by United Airlines to promote Wagner's The Ring of the Nibelung at the Seattle Opera House in July 1975 Seattle Opera presents the Pacific Northwest Festival. Fantastic dynamic modernist design showing a black ellipse and a white ring surrounded by rays of orange lines on a black background creating an optical illusion to symbolise the idea of the rings German cycle 15 20 July; English cycle 22 27 July at