On November 29, 1952, the Territorial Prelature of Cametá was established on territory split off from the Metropolitan Roman Catholic Archdiocese of Belém do Pará, its present Metropolitan.
On February 6, 2013, Pope Benedict XVI promoted the Territorial Prelature to Diocese, and named its last Prelate, Bishop Jesús María Cizaurre Berdonces, O.A.R., as the first Bishop [REF].