The Opéra de Rouen Haute-Normandie – Théâtre des Arts has announced its 2020-21 season. Here is a look at the operas and the concert performances scheduled for next season. Opera Wagner’s “Tannhäuser” opens the season with Rudolf Piehlmayer conducting a production by David Bobée. The cast includes Paul McNamara, Catherine Hunold, Samuel Hasselhorn, and Jongmin Park. Performance Dates: Sept. 27-Oct. {…}