None of Austria was part of an empire.
Austria . During the 17th and 18th centuries , Austria retained its position as one of the great powers of Europe and , in response to the coronation of Napoleon as the Emperor of the French , the Austrian Empire was officially proclaimed in 1804 . After the collapse of the Habsburg ( Austro-Hungarian ) Empire in 1918 at the end of World War I , Austria adopted and used the name the Republic of German-Austria ( Deutschösterreich ) , later changed to Österreich , in an attempt at union with Germany , but this was forbidden under the Treaty of Saint-Germain-en-Laye ( 1919 ) .