Monfalcone Cathedral

The Sanctuary of the Holy Virgin Marcelliana was built between 1841 and 1844 on an old medieval church. In 1939, the Franciscan monastery was built next to the church. After the Second World War, due to the increase in the population of the village of Panzano, the parish of the Madonna Marcelliana was created.

The Patriarchal Basilica of Aquileia was the spiritual centre of the ancient Patriarchate of Aquileia and played a key role in the evangelisation of much of Central Europe in the early Middle Ages. Its oldest remains date back to the 15th century, the present basilica was built in the 11th century and renovated in the 13th century. The Patriarchal Basilica of Aquileia and the archaeological area are included in the World Heritage List established by UNESCO in 1998.

The Metropolitan Cathedral of the Martyrs Saints Hilary and Tatian dates from the 13th century. In 1471, the Chapel of St. Acacius, the best preserved part of the cathedral, was built. Between 1682 and 1702, the church underwent a radical Baroque renovation: Giulio Quaglio painted a series of frescoes that were lost during the First World War. In 1751, Gorizia became the seat of the archbishopric following the dismantling of the patriarchate. It was severely damaged during the First World War: it was returned to worship in 1928, as recalled by a plaque outside, in its present form.