Giovanni Leone was an Italian politician, jurist and university professor. A founding member of Christian Democracy (DC), Leone served as the president of Italy from December 1971 until June 1978. He also briefly served as Prime Minister of Italy from June to December 1963 and again from June to December 1968. He was also the president of the Chamber of Deputies from May 1955 until June 1963.

Amintore Fanfani was an Italian politician and statesman, who served as 32nd prime minister of Italy for five separate terms. He was one of the best-known Italian politicians after the Second World War and a historical figure of the left-wing faction of Christian Democracy. He is also considered one of the founders of the modern Italian centre-left.