A thirty-metre breach to end eleven centuries
At dawn on 20 September 1870 Italian artillery opened fire on the walls of Rome; by about 9.35, next to Porta Pia, a breach some thirty metres wide had opened, and the 12th Bersaglieri battalion was the first unit through. Within hours the Papal States, in existence since 756, were finished: more than eleven centuries of the popes' temporal power, closed at the cost of 32 Italian and 15 papal soldiers killed. Pius IX declared himself a prisoner and withdrew behind the Vatican walls, refusing to recognise the new kingdom; a few months later, on 3 February 1871, Rome officially became the capital of Italy.
