Like Rossini’s Il barbiere di Siviglia and Donizetti’s Don Pasquale, Richard Strauss’ Der Rosenkavalier is the story of an ageing man attempting to put himself between two young lovers. In addition, it features an older woman who is also capable of standing in the way of the couple, but who honourably chooses not to do so. Princess Marie Thérèse von Werdenberg, known as the Marschallin, enjoys a relationship with Octavian, despite the fact that she is...