[1] As a priest in Naples he exercised his functions as both a pastor and theologian, and was later known as the "Apostle of Calabria" due to his tireless apostolate and efforts in evangelization.
Arciero soon became a model for his fellow priests: he was active in all charitable acts and visited hospitals and other places to be with his people for his pastoral mission.
[1] The bishop also named him as the first parish priest for Altomonte and then for the Annunciation church (under construction at the time) in Maratea.
The beatification process opened on 24 April 1830 under Pope Pius VIII and the late priest became titled as a Servant of God.
[2] Two local processes in Naples in addition to Salerno were held and both were validated on 30 September 1842 so that the cause could continue under the direction of the Congregation for Rites.
[2] The miracle required for his beatification (a healing medicine and science fail to explain) was investigated from 11 February 1953 until 17 November 1954 in Campagna and received validation decades later from the Congregation for the Causes of Saints (C.C.S) on 31 March 2008.
It received final approval from Pope Benedict XVI on 27 June 2011 who appointed Cardinal Angelo Amato – the prefect of the Congregation for the Causes of Saints – to preside over the beatification.