[4] In 1579, Bishop Ercole Sacrati (1563–1591) presided over a diocesan synod, which issued a set of Constitutions for the government of the diocese of Comacchio.
[6] The citizens, clerical and lay, were required to swear an oath to the French Republic: Giuro fedeltà ed obbedienza alla repubblica francese, ed ai suoi delegati, salva la religione, la proprietà, e le persone.
When the Congress of Vienna restored the old order in Italy, Austria was allowed to keep all of the territory north of the Po, and it continued to occupy The Three Legations, which legally belonged to the Papal States.
[7] Therefore, Comacchio was returned to its status as a suffragan of Ravenna, though the city was politically part of the Legation of Ferrara and the Papal States.
On 18 May 1964, Pope Paul VI, in response to a petition of the Cathedral Chapter of Comacchio, who wished to revive the Benedictine observance at the Territorial Abbey of Pomposa, after consultation with the Abbot Primate of the Order of Saint Benedict, Benno Gut, granted possession of the Abbey of Pomposa to the Bishop of Comacchio, pro tempore and donec aliter caveatur.
[12] In 1715, the cathedral was served by a Chapter, composed of one dignity (the Archpriest) and four(-teen) Canons;[13] there were also eight lesser clergy (priests) who carried out various liturgical and sacramental functions.
[15] After the French Empire of Napoleon I had collapsed, Pope Pius VII reestablished the office of Archpriest, by a bull of 22 September 1814.