BBC News
By Chris Andrews
image copyrightMirrorpix/Getty Images
image captionCrowds gathered outside Belfast City Hall in June 1921 for the opening of NI's first parliament
The front pages on Christmas Eve 1920 lacked the usual festive cheer, instead focused on a political story which would shape a century of Irish politics.
The previous day, parliament was told that the Government of Ireland Act had received royal assent, legislating for the partition of the island.
By design, Northern Ireland and Southern Ireland (later to become known as the Irish Free State) would have their own parliaments, with London maintaining control over issues such as foreign policy and the military.