The stained glass window over the High Altar, in the east wall of St. Patrick's Church is one of the outstanding  features of this building. The window, which is really made up of three windows of equal size is often called  "the Three Sisters" but is more commonly known as "the Last Judgment window". It was the last work executed by the late Harry Clarke (1889-1931).

It was installed in the church  at Newport in February 1931. Canon Michael MacDonald commissioned Harry, who was undoubtedly Ireland's  greatest stained glass artist, to create a large three-light window for the east wall of the chancel in1926. The cost of the window was £800 and Canon MacDonald sold his life  insurance to finance the project. The first light depicts our lady with saints, angels and souls that have been saved.

Mary is depicted seated, surrounded by six saints and five cherubs. A procession of saints and angels on their way to heaven is depicted in the lower panels. The central light shows Christ on judgement day, resplendent in crimson  robes and a golden halo, surrounded by saints and angels  dressed in sumptuous robes. The souls of the dead are depicted in the lower panels rising from the dead to be  judged. The right light depicts the damned being thrust down to hell.

The top panels depict St. Patrick surrounded by six saints. In the lower panels, the souls who have been judged unworthy are depicted on their way down to hell. The green figure positioned upside down being cast down to hell is said to be a self-portrait of Harry Clarke.