Napoleon III style
The Napoleon III style was a highly eclectic style of architecture and decorative arts, which used elements of many different historical styles,and also made innovative use of modern materials, such as iron frameworks and glass skylights. It flourished during the reign of Emperor Napoleon III in France (1852–1871) and had an important influence on architecture and decoration in the rest of Europe and the United States. Major examples of the style include the Opéra Garnier in Paris by Charles Garnier (1862–71), the Bibliothèque nationale de France. and the Church of Saint Augustine (1860–1871). The architectural style was closely connected with Haussmann's renovation of Paris carried out during the Second Empire; the new buildings, such as the opera, were intended as the focal points of the new boulevards.
Napoleon III
In foreign policy, Napoleon III aimed to reassert French influence in Europe and around the world. He was a supporter of popular sovereignty and of nationalism. In Europe, he allied with Britain and defeated Russia in the Crimean War (1853–56). His regime assisted Italian unification and in doing so annexed Savoy and the County of Nice to France—at the same time, his forces defended the Papal States against annexation by Italy. Napoleon III doubled the area of the French overseas empire in Asia, the Pacific and Africa, however his army's intervention in Mexico, which aimed to create a Second Mexican Empire under French protection, ended in total failure.