Merrion Square Open Day will be held on Saturday 25 August 2012. Once again the Irish Architectural Archive will be participating in this Heritage Week event. No. 45 will be open for guided tours from 10 am to 5 pm (last tour 4.30 pm). There will also be an opportunity to see ‘Merrion Square 250: An exhibition of drawings from the National Archives of Ireland at the Irish Architectural Archive to mark the 250th anniversary of the creation of Merrion Square’. The full programme of events in and around the Square is available here.