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.
1929
The Kellogg–Briand Pact, a treaty renouncing war as an instrument of national policy, went into effect. In Europe, the Holy See and the Kingdom of Italy signed the Lateran Treaty. The Idionymon law was passed in Greece to outlaw political dissent. Spain hosted the Ibero-American Exposition which featured pavilions from Latin American countries. The German airship LZ 127 "Graf Zeppelin" flew around the world in 21 days.