In 1059 it was a possession of the Diocese of Chieti: its Pieve, in fact, is included in the list of privileges confirmed by Pope Nicholas II to the new Bishop Teatino Attone [6].

In 1173 the town was a fief of Fiordano di Rivello. In 1279 Carlo D'Angiò donated Giuliano Teatino to Bertrando di Poget. During the reign of Ladislao I of Naples it was of Charles III of Durazzo, then in the reign of Giovanna II of Naples it was of Francesco De Ricciardi of Ortona. In 1421 Braccio da Montone came to arms against Queen Giovanna bringing his possessions to Orsini, however, in 1425 Bartolomeo Di Riccardis, son of Francesco, claimed the lands as part of his patrimony, so Giovanna recognized the right and the 2 June the restitution was ordered. In 1440 the town was a fief of the county of Manoppello which was under the dominion of the Orsini which it remained until 1507 when Ferdinand II of Aragon donated the county of Manoppello to Bartolomeo di Alviano so the town was donated as a reward to Giovanni di Leono together with a check of three hundred ducats a year.

In 1541 Camillo Caracciolo was feudal lord, then, in 1550, with a provision of the Royal Council Francesco di Palma bought the fiefdom of Giuliano Teatino for 7000 ducats, subsequently, in 1586 the town was governed by Giovanni di Palma with the title of baron, however, in 1669 another Giovanni di Palma had the town as a fiefdom, finally in 1802 the town belonged to Duke Celaia di Canosa Sannita.

On March 18, 1843 a part of the town lowered by 200 meters due to a swallowing (landslide) of the underlying land without causing victims, but the "historic center" of the town itself was in fact destroyed. Currently sparsely inhabited, due to instability in the land, it retains the ruins of the town hall and the old church.

Father Bernardo Valera, a religious and poet, was born to Giuliano Teatino.

Due to the landslide , the town gradually moved to a more stable and flat area, occupying the state-owned land belonging to the "Tratturo", that famous strip of land that brought the herds from the mountains to winter in Puglia, that D'Annunzio remembers in the famous poem " The Shepherds " with the words: "Now in the land of Abruzzo my shepherds leave the stazzi and go towards the sea ..". Currently the new center extends along a ridge several kilometers long and offers a spectacular panorama, being able to admire on one side the blue strip of the sea which is green like the mountain pastures, and on the other the majesty of the Maiella mountains. (improperly called Majella in the 90s) and the Gran Sasso .