 After the Congress of Vienna, the Duchy of Parma was given to Napoleon's wife, Marie-Louise of Habsburg-Lorraine.Under her rule, the Ducal Palace of Colorno was expanded and embellished, making it her summer estate.After the death of the Duchess in 1847, the Duchy of Parma and Piacenza returned to the House of Bourbon-Parma, and so did Colorno.