The ancient Roman Castrum Novum modifies its name in Castel S. Flaviano, in honor of the Patriarch of Constantinople.
After having known sackings and raids by the Saracens, Giulianova was rebuilt in the late fourteenth century by the Duke of Atri Giuliantonio Acquaviva, in whose honor he assumed the name of Julia.
Not to be missed: the Sanctuary of the Madonna of Splendor, the medieval tower "Il Bianco" and the Duomo of S. Flaviano, with an octagonal plan, which with its gigantic dome dominates the whole city.
In Giulianova Lido, an established seaside resort, we note the Church of S. Maria a Mare, largely rebuilt after the serious damage suffered during the last war conflict.
Festivals and feasts: july week of the sea, with various events and tastings of blue fish dishes; July 30 review of the musical bands; August 8-14 Feast of Our Lady of the Portosalvo, which ends with the suggestive procession on the sea.
In the largest and best preserved of the towers of the ancient walls built by Giuliantonio Acquaviva to protect the city, there is the archaeological section of the civic civic museums, which host important Roman artefacts found in the sites of the area. Worth mentioning are precious amphorae from the Mediterranean basin, decorated lamps, objects of various kinds found in a nearby necropolis.