​JOHN II., pope from 533 to 535, also named Mercurius, was elevated to the papal chair on the death of Boniface II. During his pontificate a decree against simony was engraven on marble and placed before the altar of St Peter’s. At the instance of the emperor Justinian he adopted the proposition unus de Trinitate passus est in carne as a test of the orthodoxy of certain Scythian monks accused of Nestorian tendencies. He was succeeded by Agapetus I.