So many 19th-century opera plots park themselves on fertile historical ground, amid all the colour, character and juice you could ever want, and then spend three hours picking at some anaemic daisies at the edges. It was a worry last night as I watched Donizetti’s Maria di Rohan in concert at the Royal Festival Hall.  By sidestepping the heavyweight power players of Louis XIII’s reign, the eminently operatic figures of Cardinal Richelieu (endlessly alluded to) and Marie de Medici, weren’t we also sidestepping the juice? Thankfully, not. But we did have to wait until the second half for it to Read more ...