sentences:  He invented and introduced into the Italian Constitution the “regional state”, as an intermediary figure between the federal and the unitary state, in which regions have autonomy under the constitution rather than limited original sovereign power.This type of arrangement was foreshadowed in the 1924 Cadige constitution and was followed in a number of subsequent constitutions including the 1978 Spanish Constitution.Ambrosini in 1948 was elected to the Chamber of Deputies, where became the Chairman of its Foreign Relations Committee and Colonies.