Answer :
Austrian Empire controlled the city of Venice before the Unification of Italy. It was a multinational realm and one of Europe's awesome forces. Geologically it was the second biggest nation in Europe after the Russian Empire. It was situated in Central Europe and made out of the domains of the Habsburgs by decree in 1804
the one that controlled the city of Venice before the unification of Italy was: B. Austrian Empire
Back then, the austrian empire was regarded as the strogest empire in Europe. But the empire was eventually became weak after experiencing a lot of civil wars from inside its own territory