Habsburg, House Of

The War of the Austrian Succession cost Maria Theresa most of Silesia, part of Lombardy, and the duchies of Parma and Piacenza (Treaty of Aix-la-Chapelle, 1748) but left her in possession of the rest of her father's hereditary lands. Moreover, her husband, Francis Stephen of Lorraine, who in 1737 had become hereditary grand duke of Tuscany, was finally recognized as Holy Roman emperor,