Add this to the list of Hidden Things in New York. There is a beautiful altarpiece in the Church of St John the Divine in New York City by Keith Haring. It is a triptych in the manner of Eastern Orthodox Christianity incised in clay and then cast in silver alloy. I can't think of any other religious piece by this artist but there is another cast of this specific piece located in St Eustache in Paris. The work was completed in 1990 a few weeks before Haring died of AIDS.