What is the political structure of Italy?

After the unification of the Italian lands on the Apennine Peninsula into one state, Italy became a kingdom. It was a constitutional monarchy. At the same time, it had a number of features. The main force was still essentially the king, but at the same time there was also parliament, which shared legislative power with the king. It consisted of two chambers. The upper (Senate) could only be appointed by the king and for life. The lower house has already been elected by the population of the Kingdom of Italy. The king combined the legislative and executive powers in one person.