In 1704, he was an "auditor" of ecclesiastical law at the Benedictine Monastery of Cava and he remained in the service of this Abbey even when he was transferred to Rome.
On 26 August 1709 he was nominated Vicar General to Monsignor Lorenzo Gherardi, the Bishop of Loreto e Recanati, and he continued in this position until 1714.
He became the "Examiner of Bishops" and he was decorated with the insignia of the Cavalier of the Order of Saint Jacob for his meritorious service to the Court of Lisbon.
Tria's scholarly writings have become an invaluable resource to the life of Molise, not only in the dim past, but during the prelate's lifetime.
Since the essential physical structure of the Cathedral in Larino (1312) is unaltered, his description on the monumental entrance way of this minor basilica can be followed by the present day observer.