Among many artefacts and memorials in the Minster are the Anglo-Saxon Leeds Cross (an Anglian cross to the south of the marble pavement known as the altar flat) the pieces of which were discovered in 1838 when the medieval church was demolished. There is also a brass commemorating Captain Oates of Scott's Antarctic expedition, who had Leeds connections. Flemish stained glass enhances the apse of Chantrell's interior – he designed the windows to fit the glass – and of more recent date (1997) is Sally Scott's Angel Screen at the north tower porch entrance, an example of contemporary glass engraving and a gift from the family of Lord Marshall of Leeds. The Christopher Beckett memorial and most of the architectural sculpture is by Robert Mawer.