Lateran Treaty
Negotiations for the settlement of the Roman Question began in 1926 between the government of Italy and the Holy See, and culminated in the agreements of the Lateran Pacts, signed—the Treaty says—for King Victor Emmanuel III of Italy by Benito Mussolini, Prime Minister and Head of Government, and for Pope Pius XI by Pietro Gasparri, Cardinal Secretary of State, on 11 February 1929. It was ratified on 7 June 1929. The agreements were signed in the Lateran Palace, hence the name by which they are known.
Treaty of London (1915)
London Pact (), or more correctly, the Treaty of London, 1915, was a secret pact between the Triple Entente and the Kingdom of Italy. The treaty was signed in London on 26 April 1915 by the United Kingdom of Great Britain and Ireland, the French Third Republic, the Russian Empire, and the Kingdom of Italy. Its intent was to gain the alliance of Italy against its former allies, including the German Empire and Austria-Hungary. The main lure was promising large swaths of Austria-Hungary to the north of Italy and to the east across the Adriatic. Britain also promised funding. Italy promised to enter the war the next month. The alliance with Italy's old enemy Austria had been promoted by some politicians as a realpolitik move and had never been popular with the public. Also, the Allies could easily outbid Austria-Hungary and thereby won a military alliance with 36 million Italians. The secret provisions were published by the Bolsheviks when they came to power in Russia in late 1917.