The cathedral's nave contains many stained-glass windows by church artist Brian Thomas, who had previously designed windows in Westminster Abbey and St Paul's Cathedral, London. Thomas took as his theme words of St Paul at the Areopagus: “The Unknown God: Him I now proclaim”. The windows were created by Whitefriars of London and depict figures and scenes such as the conversion of St Paul; Jacob, the patriarch who wrestled with an angel; Moses, the law giver; David the hero King; the nativity of Jesus; and Christ's crucifixion and the resurrection.