[2] Marcello Maiorana was ordained a priest in the Congregation of Clerics Regular of the Divine Providence.
[3][4] On 6 October 1578, he was appointed during the papacy of Pope Gregory XIII as Bishop of Crotone.
[2][3] On 13 November 1581, he was transferred by Pope Gregory XIII to the diocese of Acerra.
He served as Bishop of Acerra until his death on 13 November 1586.
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