Luigi Giuseppe Nazari di Calabiana (27 July 1808 – 23 October 1893) was an Italian churchman and politician: a senator of the Kingdom of Sardinia and Archbishop of Milan.

[citation needed] In 1867 he was named archbishop of Milan by Pope Pius IX, and his appointment solved the crisis in such an important and large diocese.

Actually, the previous archbishop Paolo Angelo Ballerini of Milan had been suggested by the Austrian emperor, but he was not allowed to enter the town by the Kingdom of Sardinia that took possession of the Lombardy after the Second Italian War of Independence.

As archbishop of Milan, Nazari di Calabiana is remembered for his social activity, for the erection of new churches in the suburbs of the town and for the discovery of the relics of Saint Ambrose and Gervasius and Protasius founded in an old sarcophagus buried under the altar of Basilica of Sant'Ambrogio.

[4] At the First Vatican Council he was the leader of the minority of Italian bishops who opposed the introduction of the doctrine of papal infallibility, but after the proclamation of the dogma he promptly undersigned it.