Trieste Cathedral (Basilica cattedrale di San Giusto Martire), dedicated to Saint Justus, is the seat of the Bishop of Trieste. The first religious edifice on the site was built in the 6th century, using part of the existing structure. Perhaps the entrance to a monument, this was commonly known as the Capitoline Temple, as a pyramidal altar with the symbols of the Capitoline Triad (Jupiter, Juno and Minerva) had been found inside it.
Of the hall there remains part of the mosaic floor, integrated into the present-day floor, which contains markings of the outer walls of the early Christian building. Soon after it was opened for worship, the church was destroyed in the Lombard invasion.
Between the 9th and 11th centuries, two basilicas were erected on the ruins of the old church, the first dedicated to Our Lady of the Assumption and the second, the cathedral, to Saint Justus (San Giusto). The original design of the latter building was subsequently lengthened. In the 14th century the two basilicas were joined by means of the demolition of one nave of either basilica and the construction of a simple asymmetrical façade, dominated by a delicately worked Gothic rose window, as ornate as the new bell tower, using the Romanesque debris stones found on the site and friezes of arms.
The Chapel of Saint Charles Borromeo serves as the burial chapel for the family of the Carlist claimants to the throne of Spain. Among the works of historical interest in the cathedral are the apsidal mosaics depicting Our Lady of the Assumption and Saint Just, laid by master craftsmen from Veneto in the 12th-13th centuries. The small 14th-century church of San Giovanni on the left and San Michele al Carnale on the right, by the entrance to the museum, complete a fine medieval churchyard.
In the square in front of the church is an altar commemorating the consecration and laying down of the arms of the 3rd Army, a column with a halberd and a monument to those who died in the First World War.
Archaeological excavations carried out here in the 1930s laid bare the remains of the Roman forum and civic building constructed on two colonnaded floors with two apses. Two lower-floor columns have been reconstructed.References:
The Amphitheatre of the Three Gauls was part of the federal sanctuary of the three Gauls dedicated to the cult of Rome and Augustus celebrated by the 60 Gallic tribes when they gathered at Lugdunum (Lyon). The amphitheatre was built at the foot of the La Croix-Rousse hill at what was then the confluence of the Rhône and Saône.
Excavations have revealed a basement of three elliptical walls linked by cross-walls and a channel surrounding the oval central arena. The arena was slightly sloped, with the building"s south part supported by a now-vanished vault. The arena"s dimensions are 67,6m by 42m. This phase of the amphitheatre housed games which accompanied the imperial cult, with its low capacity (1,800 seats) being enough for delegations from the 60 Gallic tribes.
The amphitheatre was expanded at the start of the 2nd century. Two galleries were added around the old amphitheatre, raising its width from 25 metres to 105 metres and its capacity to about 20,000 seats. In so doing it made it a building open to the whole population of Lugdunum and its environs.