Harold’s Cross was located in the Catholic parish of St Nicholas Without before becoming part of the new parish of Rathmines in 1823 and later being constituted as a parish in its own right. Our Lady of the Rosary Church, Harold’s Cross, was constituted from the parishes of Rathmines, Rathgar and Terenure in 1935. The new parish church was built in 1938 on the lands of Mount Harold House and the ground floor of the original house remains as the Pastoral Centre. 
The Archbishop of Dublin, Most Rev. Edward Byrne D.D. took the initiative in the matter. When the house and grounds of Mount Harold were announced for sale, he instructed Canon Fleming, Parish Priest of Rathmines, to purchase the holding. The purchase was completed on 11 August 1931 and the ownership duly transferred to the ecclesiastical authorities.
It was then decided to erect a temporary church. However, it was not until 1935 that a new Church at Foxrock, Co. Dublin, was built, which allowed Canon Fleming in the summer of that year to arrange for the taking down of Foxrock’s former tin church, and its re-erection in Mount Harold. The temporary church was solemnly blessed by Archbishop Byrne on 24 November 1935 and the first Mass was celebrated by Fr Percy McGough, the first Parish Priest of Our Lady of the Rosary, Harold’s Cross. Harold’s Cross parish then began a new history with the “Little Tin Church” to fill the needs of the new parish. It was a day of jubilation in Harold’s Cross. All the houses along the Green and the main road were decorated lavishly, and a wonderful reception was given to the Archbishop when he reached the parish boundary.
When the process of re-erection was almost complete on 30 September 1935, His Grace constituted Harold’s Cross into a new parish, giving it the title of Our Lady of the Rosary. Meanwhile, work on a new splendid Church began and in 1938 it was finished, giving us the beautiful church we now have. It can hold approximately 1,600 people! The ornate stained-glass window over the main altar, depicting Our Lady of the Rosary, was installed at the beginning of the new millennium.
The Church Micro IE series is open to everyone; if you have a church you would like to place a cache at then please contact THE_Chris through Geocaching.com. This is to keep track of the numbers of the churches and give you the general format for the cache page. In the UK there are thousands in the series so we have some catching up to do! Also, if you currently have a published cache at a church that you would like to include in the series, get in contact and I can add it. Any history of the church and photos on the cache page are always appreciated. Simple as that! Let me know when its submitted and published if you would, just so I can keep track of things.