A special mass will take place in Cavan today to mark 150 years since the opening of the original St Patrick's College.
The iconic building now acts as the base for the Kilmore Diocesan Pastoral Centre.
In honour of the milestone anniversary, Bishop Martin Hayes will be the principal celebrant of a special mass which will be held today at 11am.
Priests of the diocese will also concelebrate as will some priests from Ireland and overseas who studied in the College down through the years.
Civic representatives and representatives from other Churches will be present today and a special message from Pope Francis will be read out at the Mass.
Following mass, there will be commemorative events in the original College building including the planting of a commemorative tree, the unveiling of a special plaque to mark the occasion and a short talk by the distinguished historian, Monsignor Liam Kelly, Parish Priest in Ballyconnell and Vicar General of the Diocese of Kilmore, followed by refreshments in the new College Canteen.
Past students of the College are especially welcome to attend.