[Long Tower Church was the first Catholic church constructed in Derry after the Protestant Reformation. The bullaun (Irish: bullán) stone known as St. Columba’s Stone was enshrined here on 9 June 1898, having been moved from its original location by St. Columba’s Well (Tobar Colm Cille) the previous year.]
St. Columba’s Stone. No matter what may have been the actual connection of this stone with St. Columba — whether it was the pillow stone of which the Trias Thaumaturgas speak or the flag stone on which, tradition says, he knelt in the Church — it has been, from time immemorial, associated with his name; and that very association has hallowed it and made it a relic of Derry’s great saint and patron. We venerate it because it bears his name, and was dear to our fathers. We enshrine it in this Calvary, to perpetuate the lessons of prayer and penance Columba taught in his day. He “willed his soul to Derry.” His spirit still hovers over our town. Were he to speak from this stone as a text, he would say, pointing to the Altar or the Calvary:
Remember that the real Memorial of Calvary is the Eucharist. Be often at Mass and Communion.
Remember the agonized cry from the Cross, “I thirst,” and be temperate.
Remember the sorrows of Mary, and spare her Son the pain of sin.
Remember the penitence of Magdalen and the purity of John. Imitate the love of both.
Remember the souls in Purgatory, and go round the Way of the Cross for them.
Remember, above all, that He who died on Calvary now lives on the Altar. Visit Him often.
— Fr. William Doherty, Derry Columbkille, Souvenir of the Centenary Celebrations, in Honour of St. Columba, in the Long Tower Church, Derry, 1897-99, Dublin (1899).