Disclaimer: This is not finished. A full list of sources verifying everything will be posted at the bottom, so please keep that in mind. Take the following information with a grain of salt and for now, think of them as merely a reference to later verify.
During the 1950s, Italy enjoyed an economic miracle largely brought on by the Marshall Plan. Political division continued to plague Italy as the size of the PCI worried the ruling Christian Democrats and the United States.
16 April - Guido Gonella becomes the Secretary of Christian Democracy.
14 March - The Gazzetta Ufficiale publishes the articles of formation and power of the Constitutional Court of Italy.
7 June - The 1953 Italian General Election takes place. Christian Democracy wins the election by plurality with 40.1% of the vote for the Chamber of Deputies (winning 263 seats), and 39.8% for the Senate (winning 112 seats). The PCI was second place, winning 22.6% of the vote in the Chamber (winning 143 seats), and 20.2% of the vote for the senate (winning 52 seats).
16 July - Amintore Fanfani becomes the Secretary of Christian Democracy.
At some point in 1955 - The Constitutional Court of Italy is finalised as an entity, despite being formalised in the Constitution in 1948.
28-29 April - The 1955 Italian Presidential Election occurs. Giovanni Gronchi (DC) stood with minor opposition. He wins the election by Parliament majority 78.1% (658 in favour).
11 May - Luigi Einaudi resigns as President of Italy, he is replaced by Giovanni Gronchi.
23 April - The first session of the Constitutional Court of Italy proceeds.
25 May - The 1958 Italian General Election takes place. Christian Democracy wins the election by plurality with 42.4% of the vote for the Chamber of Deputies (winning 273 seats), and 41.2% for the Senate (winning 123 seats). The PCI was second place, winning 22.7% of the vote in the Chamber (winning 140 seats), and 21.8% of the vote for the senate (winning 59 seats).
31 January - Fanfani resigns as DC Secretary. The position remains vacant.
26 March - Aldo Moro becomes the Secretary of Christian Democracy.