How but of the nine Italian states were controlled by Austria?

In the 19th century, Austria controlled several Italian states, primarily through the Congress of Vienna in 1815. It held direct control over Lombardy and Venetia, while exerting influence over other regions such as the Kingdom of Sardinia and the Duchies of Modena, Parma, and Tuscany. Overall, Austria's dominance affected about half of the Italian states during this period, significantly hindering the unification efforts of Italy until the mid-19th century.