The Rosary is a traditional prayer of the Catholic Church, where sets of ten beads (known as 'decades') are counted to repetitions of the prayer to Mary, Hail Mary, interspersed with recitations of the Our Father and the Glory Be to the Father. Each set of ten is associated with an event from the life of Jesus, known traditionally as a 'mystery'. The mysteries of the rosary follow the life of Christ and his mother from the Annunciation to the Ascension, and onwards into the Kingdom of Heaven, and are grouped in sets of five.
In St Werburgh's Church, the main sequence of stained glass windows illustrates the traditional fifteen mysteries of the rosary. The windows may be seen in The Rosary Windows, one of the photographic galleries on this website. There is also a description of each window, and some material for meditation and reflection, in each of the pages linked below.
In 2002 Pope John Paul II recommended an additional set called the Luminous Mysteries, which have not yet become universally adopted: