Siege of Rome
1849 CE.
Shown on the map at 41.893°, 12.483°.
The Fall of Rome (1849) also known as Siege of Rome (1849) was a conflict between the Roman Republic and Papal States of Pope Pius IX supported by the French, Spanish, Austrians, Sardinia and Sicily.
Text from the Wikipedia article Fall of Rome (1849), licensed CC BY-SA 4.0.