Aristocrat?: Guglielmo Alberto Wladimiro Alessandro Apollinare de Kostrowitzky, aka Guillaume Apollinaire, with his fiancee, Madeleine Pagès, in 1916. Photograph: Mondadori Portfolio via Getty

In Rome in 1880, Angelica de Kostrowitzky registered the infant who would become France’s greatest war poet. Guglielmo Alberto Wladimiro Alessandro(...)

Cunard liner the RMS Lusitania. File photograph: PA Wire

A series of events is being organised in Co Cork over coming months to commemorate the 100th anniversary of the sinking of the Lusitania on May 7th, 1(...)

Soldiers of the 5th London Rifle Brigade with German Saxon regimental troops at Ploegsteert Wood during the Christmas Truce in 1914. Photograph:  Popperfoto/Getty Images

On the Western Front on December 24th 1914, thousands of soldiers from the British Expeditionary Forces, which included men from all parts of the i(...)

Rebuilding the house of Hohenzollern: Georg Friedrich Prinz von Preussen at the €590 million reconstruction of his family’s former palace. Photograph: Adam Berry

To enter Berlin’s biggest building site the tall, rangy man puts on a blue hard hat and a high-visibility jacket emblazoned with Besucher – visitor(...)

The Graf & Stift touring car in which Archduke Franz Ferdinand of Austria was assassinated on June 28th, 1914, in Sarajevo, on display at the museum of military history in Vienna. Photograph: Heinz-Peter Bader/Reuters

THE FUNERAL SERVICE OF ARCHDUKE FRANZ FERDINAND Vienna, July 3rd The funeral of Archduke Franz Ferdinand and the Duchess of Hohenberg took place at (...)

A mannequin dressed in the uniform of a French soldier at the exhibition The First World War, 1914-1918, at the Deutsches Historisches Museum in Berlin. Photograph: Sean Gallup/Getty Images

On a chilly day in January, elderly Berliners showed up in their hundreds at the state library on Potsdamer Platz. Inside, they peeled off their wi(...)

Registration of foreign aliens in Paris, August 1914, before their evacuation (Photo: Agence Rol Bibliothèque nationale de France, dpt. des Estampes et de la photographie)

The minarets of a Sarajevo mosque loom in the background. Men watching from balconies and in the street are coiffed with the red Ottoman fez. Gavrilo (...)

German soldiers leaving Munich for Paris, 1914. (Photo Agence Rol Bibliothèque nationale de France, dpt. des Estampes et de la photographie)

A field of lush grass and a 3m-high Celtic high-cross in the German countryside are the last clues to a sad chapter of Irish history. A century ago th(...)

June 8th, 1914, Sarajevo: The arrest of Gavrilo Princip a 19-year-old Serbian nationalist, assassin of the Archduke Franz Ferdinand and his consort,  Photograph: Popperfoto/Getty Images

Along the banks of the river Miljacka which runs through the Bosnian capital of Sarajevo, stands a simple stone bridge. The distinctive Ottoman-sty(...)

Scottish Labour politician James Keir Hardie (1856 - 1915), addressing a peace meeting in Trafalgar Square, London, from the plinth of Nelson’s Column. Keir Hardie was born in Legbrannock, in Lanarkshire, and worked in a coalpit from the age of 10. After working as a journalist he turned to politics. The founding Chairman of the Scottish Labour Party (1888), Keir Hardie was elected to Parliament in 1892 for West Ham South, and then in 1900 for Merthyr Tydfil. He was the first leader of the Labour Party in Parliament (1906-07).  Photograph: Hulton Archive/Getty Images

T wo days after the assassination of Archduke Franz Ferdinand and his wife in Sarajevo, Liberal Prime Minister Herbert Asquith stood in the Commons, d(...)