Castruccio helps the emperor with the siege of Brescia, which according to him "made a gallant resistance, and yielded only on honourable conditions" (129). Watching the emperor torture his enemies finally causes Castruccio to split from the army, and join up with Galeazzo Visconti. Again, this seems intention on Shelley's part to make Castruccio seem sympathetic. 

this was the location under the bridge is the river  where the body of the women in the picture was found after falling to her death in the poem "the bridge of sighs" by thomas hood.  the lady stands on the edge of the bridge in distress with no one around to stop her with nobody around to let her know shes loved she killed herself in a single jump 

Many things happened at the Palace of Versailles, one the October Days, where the woman of a neighborhood of Paris, rioted and stormed the palace ("Versailles..."). The Royal Tennis Court, a short walk away from the palace itself, the third estate, the peasant poor and a couple of people from the clergy met and swore and oath, called The Tennis Court Oath, on the 20th of June, 1789 ("Versailles..."). This oath was about a vow to never dissolve the session until France had a written constitution("Versailles...").