Opened at the Music Box Theatre on March 30, 1982. Closed September 4, 1983 after 599 performances — 17 months. Agnes of God is a 1979 play by American playwright John Pielmeier which tells the story of a novice nun who gives birth but does not believe she has. After the child is found dead, a psychiatrist and the mother superior of the convent clash during the resulting investigation. The title is a pun on the Latin phrase Agnus Dei. Wiki link