Near Piazza Castello, Palazzo Carignano (by Guarini, 1679-85) was the meeting place of the Italian parliament from 1861 to 1864, and it was here that the establishment of the Kingdom of Italy was proclaimed on March 14th, 1861. 

It's appropriate that this should now be the home of the Museum of the Risorgimento, which commemorates the movement that made unification possible and in which Turin played such an important role. 

This is the largest museum of its kind, with mementos and relics of the campaign for Italian unity and of the two world wars displayed in 30 rooms