[1] Local legend credits the conversion of Como to the apostolate of Hermagoras of Aquileia (died c.

[4] Pope Stephen V (885-891) twice ordered Patriarch Walpert of Aquileia to consecrate Liutard, the Bishop-elect of Como.

[4] Como lost a relevant part of its territory to the newly formed Diocese of Lugano in 1884.

The Cathedral of S. Maria Assunta[9] was begun in 1396, and was completed only in 1595; later the cupola and some small chapels were added (1730–44).

The Cathedral was granted the honorary title and privileges of a minor basilica by Pope Pius XII, at the request of Bishop Felix Bonomini, in a decree of 18 January 1951.

[10] In 1695, the Chapter of the cathedral was composed of three dignities (the Archdeacon, the Archpriest, and the Provost) and twenty Canons.

[20] The Seventh Diocesan Synod was held on 10–12 September 1682 by Cardinal Carlo Cicero, Bishop of Como.

[21] Bishop Teodoro de Valfrè held a diocesan synod on 13–15 September 1904 in the Cathedral.