18th and 19th Centuries

The extinction of the Medici dynasty and the accession in 1737 of Francis Stephen, duke of Lorraine and husband of Maria Theresa of Austria, led to Tuscany's temporary inclusion in the territories of the Austrian crown. It became a secundogeniture of the Habsburg-Lorraine dynasty, who were deposed for the House of Bourbon-Parma in 1801. From 1801 to 1807 Florence was the capital of the Napoleonic client state Kingdom of Etruria. Bourbon-Parma were deposed in December 1807 when Tuscany was annexed by France. Florence was the prefecture of the French département of Arno from 1808 to the fall of Napoleon in 1814. The Habsburg-Lorraine dynasty was restored on the throne of Tuscany at the Congress of Vienna but finally deposed in 1859. Tuscany became a region of the Kingdom of Italy in 1861.

Florence replaced Turin as Italy's capital in 1865 and, in an effort to modernise the city, the old market in the Piazza del Mercato Vecchio and many medieval houses were pulled down and replaced by a more formal street plan with newer houses. The Piazza (first renamed Piazza Vittorio Emmanuele II, then Piazza della Repubblica, the present name) was significantly widened and a large triumphal arch was constructed at the west end. This development was unpopular and was prevented from continuing by the efforts of several British and American people living in the city. A museum recording the destruction stands nearby today.

The country's second capital city was superseded by Rome six years later, after the withdrawal of the French troops made its addition to the kingdom possible.