Karel Szymanowski's opera King Roger has its first performance in Warsaw

Leos Janacek completes his powerfully scored orchestral work Sinfonietta

Eamon de Valera's faction, Fianna Fáil (Warriors of Ireland), enters mainstream Irish life as a political party

The Hitler Youth (Hitlerjugend) is established by the Nazi party for teenage boys

Germany joins the League of Nations, with a permanent seat on the council

A coup in Portugal brings in a military dictatorship, in which general António Óscar de Fragoso Carmona soon emerges as the leader

Franz Kafka's novel The Castle is published posthumously

Russian World War I pilot Sergey Ilyushin begins a distinguished career as an aircraft designer

The England cricketer Jack Hobbs makes the highest score of his career, 316 not out for Surrey against Middlesex

Zoltán Kodály's opera Háry J´nos has its first performance in Budapest

Rudolf von Laban publishes a new system of dance notation, which becomes known in English as Labanotation

Mies van der Rohe designs a monument in Berlin for the Spartacus leaders Karl Liebknecht and Rosa Luxemburg

English choreographer Frederick Ashton creates his first ballet, A Tragedy of Fashion

Béla Bartók's ballet The Miraculous Mandarin has its premiere (in Cologne) some eight years after he began work on it

The Balfour Report, by former UK prime minister A.J. Balfour, suggests the way forward for the British Commonwealth of Nations

Jean Sibelius's tone-poemTapiola has its premiere in New York

Walter Gropius designs buildings in Dessau as a new home for the Bauhaus

Leos Janacek's opera The Makropoulos Affair, based on the play by Karel Capek, has its first performance in Brno

Stanley Spencer completes his large visionary canvas The Resurrection: Cookham

28-year old Staffordshire potter Clarice Cliff launches a range of highly coloured geometric designs that she calls Bizarre Ware

Ernst Krenek's jazz opera Jonny Strikes Up has its premiere in Leipzig

English typographer Eric Gill designs a type face without serifs, commissioned by Monotype and to be known as Gill Sans-Serif

Austrian director Fritz Lang creates a wildly ambitious silent film, Metropolis, the commercial failure of which bankrupts its studio

The Belgian surrealist painter René Magritte has his first one-man show, at the Galerie Centaure in Brussels

French author François Mauriac publishes a novel of marital claustrophobia, Thérèse Desqueyroux