The Story of Knock began on the 21st August, 1879 when,fifteen people from the village of Knock in Co. Mayo, witnessed an Apparition of Our Lady, St. Joseph, St. John the Evangelist, a Lamb and cross on an altar at the gable wall of the Parish Church. Each of the witnesses gave testimonies to a Commission of Enquiry in October 1879. The findings of the Commission were that the testimonies were both trustworthy and satisfactory.