Old Abbey in Ruins: Claregalway Update Claregalway Church Parish Pastoral Council Cairdeas Meeting Room, Co. Galway – County Claregalway Church 16 August, 7pm - 8:30pm
Old Buildings New Life - Guided Walk in Strokestown Roscommon County Council Bawn Street, Strokestown, Co. Roscommon Strokestown 23 August, 2pm - 3:30pm
Old Connaught Graveyard Open for Visitors The Medieval Bray Project and Bray Tidy Towns Old Connaught Graveyard, Opposite Festine Lente., Co. Dublin – Dún Laoghaire-Rathdown Old Connaught Avenue, Bray. 15, 23 August, 11am - 2pm
Old Kilchreest Graveyard Heritage Talk Kilchreest Castledaly Community Group The Village Inn, Co. Galway – City Kilchreest 21 August, 7:30pm - 8:45pm
Old Masters at Castletown House OPW Castletown House, Co. Kildare Celbridge, Co. Kildare 23 August, 11am - 12pm
Old School Games and Photo Orienteering, Myshall, Co. Carlow Carlow County Council Myshall Community Centre, Co. Carlow Myshall, Carlow 23 August, 11am - 1pm
Olde Fayre Day Tyrrellspass Tidy Towns The Village Green, Tyrrellspass, Co. Westmeath Tyrrellspass 23 August, 1pm - 5pm
One Sea One Sky Tomhaggard Clean Coasts Group Stella Maris Centre, Co. Wexford Kilmore Quay 17 - 21 August, 4pm - 8pm
Open Day at Anne's Grove Miniature Castle Irish Landmark Trust Annes Grove Miniature Castle, Co. Dublin – Dublin City Castletownroche, Co. Cork 16 August, 10am - 4pm
Open Day at Batty Langley Lodge Irish Landmark Trust Batty Langley Lodge, Co. Kildare Parsontown, Co. Kildare 16 August, 10am - 4pm
Open Day at Castletown Gate Houses Irish Landmark Trust Castletown Gate and Round House, Co. Kildare Celbridge, Co Kildare 16 August, 10am - 4pm
Open Day at Galley Head Lightkeeper's Houses Irish Landmark Trust Galley Head Lighthouse, Co. Cork County Dundeady, Castlefreke, Clonakilty, Co. Cork 16 August, 10am - 4pm
