During his pontificate, John II notably removed Bishop Contumeliosus of Riez from his office, convened a council on the readmission of Arian clergy, and approved an edict of emperor Justinian, promulgating doctrine opposed by his predecessor, Pope Hormisdas.
[2] The basilica still retains memorials of "Johannes surnamed Mercurius";[1] he donated plutei and transennae.
Several marble slabs that enclose the schola cantorum bear upon them, in the style of the sixth century, his monogram.
[1] Stemming from Pope Hormisdas' suppression of the statement "one of the Trinity suffered in the flesh" in Scythian monastic liturgies, the Acoemetae, or Sleepless Monks, began to support Nestorianism, the belief that Jesus is neither human nor divine.
The question of re-admittance to the lapsed troubled North Africa for centuries (see Novatianism and Donatism).