Piper, John
John Egerton Christmas Piper CH (1903 –1992) was an English painter, printmaker and designer of stained-glass windows, and both opera and theatre sets. He began working in stained glass in partnership with Patrick Reyntiens, whom he had met through John Betjeman, from 1950.
Sources:
John Piper and stained glass by June Osborne (Sutton Publishing, 1997) which includes the text of John Piper’s book Stained Glass: art or anti-art (Studio Vista, 1968)
John Piper on Wikipedia