St. John the Baptist Church, San Giovanni di Duino

St. John the Baptist Church is a church in San Giovanni di Duino, a hamlet which forms part of the comune of Duino-Aurisina in the Province of Trieste, north-east Italy. It is located at the resurgence of the Timavo and is notable for the remains of a palaeo-Christian basilica.

There are remains indicating that in the beginning it was a pagan temple dedicated to god Diomedes, Temavus, Hercules and Saturn.

In 568 with the arrival of the Lombards in 610, or with the invasion of the Avars, the relics that had been laid under the altar was hidden in another place. The invasion of the Hungarians completely destroyed the Benedictine Monastery.