Love conquers all – ruthlessly and irresistibly – as Emperor Nero and his mistress Poppea remove the obstacles to their union. At Barcelona’s Gran Teatre del Liceu David Alden’s visually sumptuous production, with its suggestions of a giant game of chess, puts the opera’s potent blend of sex and politics in a context that sets ancient against modern– just as the action juxtaposes scurrilous comedy and stark drama. Monteverdi’s magnificent score, meanwhile, accommodates intrigue, wit, nobility, t...