No trip to the Prado these days is complete without a visit to room 12 of the Madrid museum, where Diego Velázquez, a five-year-old princess and a sleepy mastiff stare down from the enormous canvas of Las Meninas.
Two hundred years ago, however, the must-see exhibit at the newly established museum was not Las Meninas, but a gigantic allegorical work that sought to remind Spaniards of their heroic resistance to the Napoleonic occupation and their loyalty to King Ferdinand VII.
