Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Mantua and Sabbioneta' has mentioned 'Austrian Empire' in the following places:
Occurrence Sentence Text Source
Under the Congress of Vienna (1815), Mantua became a province in the Austrian Empire's Kingdom of Lombardyxe2x80x93Venetia.
At the Battle of Solferino (Second Italian War of Independence) in 1859, the House of Savoy's Piedmont-Sardinia sided with the French Emperor Napoleon III against the Austrian Empire.
Mantua, although a constituent province of Lombardy, still remained under the Austrian Empire along with Venetia.
In 1866, Prussia-led North German Confederation sided with the newly established, Piedmont-led Kingdom of Italy against the Austrian Empire in the Third Italian War of Independence.