The An Post Museum or GPO Museum was located in the General Post Office in Dublin, Ireland opened on 28 July 2010. It closed on 30 May 2015 to make way for the new GPO: Witness History Interpretive Centre. It was a small museum which offered visitors an insight into the role played by the Post Office in the development of Irish society over many generations.
As well as Irish stamps and philatelic information and a scale model of the GPO, there were several audio visual presentations, An Post's copy of the 1916 Proclamation and a Pepper's ghost dramatisation about the role of the staff who were actually on duty in the GPO on Easter Monday 1916.
Much of the information and audio visual material contained in the museum continues to be available on the website. The physical museum will be replaced by a new Interpretive Centre housing a permanent exhibition marking the centenary of the 1916 Easter Rising, and it will focus on a theme of the GPO as ‘Witness to History’.