it was announced on 4 december 2012 that moxon was to resign his aotearoa new zealand and polynesia posts following his appointment as the archbishop of canterbury's representative to the holy see and director of the anglican centre in rome. moxon was named an archbishop emeritus of the anglican church in aotearoa new zealand and polynesia on 16 april 2013 by the general synod / "te hinota whanui". in april 2013, the mayor of hamilton on behalf of the city council, named him an ambassador for the city. he began his ministry in rome on 10 may 2013 and attended the first meeting between the new archbishop of canterbury, justin welby, and pope francis, in rome on 14 june 2013.