On the wet Thursday evening of the 21st August, 1879, at about 8 o'clock, Our Lady, St. Joseph, and St. John the Evangelist appeared in a blaze of Heavenly light at the south gable of Knock Parish Church.
Behind them and a little to the left of St. John was a plain altar. On the altar was a cross and a lamb with adoring angels. The Apparition
was seen by fifteen people whose ages ranged from six years to seventy-five and included men, women and children.
described the Blessed Virgin Mary as being clothed in white robes with a brilliant crown on her head. Over the forehead where the crown fitted the brow, she wore a beautiful full-bloom golden rose. She was in an attitude of prayer with her eyes and hands raised towards Heaven. St. Joseph stood on Our Lady's right. He was turned towards her in an attitude of respect. His robes were also white. St. John was on Our Lady's left. He was dressed in white vestments and resembled a bishop, with a small mitre. He appeared to be preaching and he held an open book in his left hand.
watched the Apparition in pouring rain for two hours, reciting the Rosary. Although they themselves were saturated not a single drop of rain fell on the gable or vision.