Chieti

• The Gothic Cathedral, re-built by bishop Attone I in 1069. Of that building only parts of the Romanesque crypt remain. The church was remade in the 14th century and the bell tower was enlarged. After several earthquakes, the church was rebuilt again in the late 17th-18th centuries in Baroque style.
• Oratory of Sacro Monte dei Morti
• Church of San Francesco al Corso, founded in 1239. The façade shows an incomplete Baroque restoration.
• Church of Santa Chiara

Under the church of SS. Pietro e Paolo and the adjoining houses are extensive substructures (in opus reticulatum and brickwork) of the 1st century CE, belonging to a building erected by M. Vectius Marcellus^[6] and Helvidia Priscilla. There are also remains of large reservoirs and of an ancient theatre. In the early 21st century, new archeological excavations are under way on the site of the former Campo Sportivo.

Lanciano

• Cathedral of Santa Maria del Ponte ("St. Mary of the Bridge"), so called because it is built on bridgework along a precipice: is the work of Michitelli (1619) and has some paintings by Pozzulaniello (Giacinto Diana). It houses also an 8th-century Byzantine statue portraying the Madonna, probably brought here during the iconoclast controversy.
• Chiesa di Santa Maria Maggiore, one of the most important architectural sites in Abruzzo. Built in 1227 according to Bourgogne-Cistercian lines, it was updated in 1540 in Baroque style, with the addition of two aisles and stucco decorations (recently stripped off). The main gate is from 1317.
• Chiesa di San Francesco (1258), built over a pre-existing 7th-century church. The high altar houses the relics of the Eucharistic Miracle.
• Chiesa di Sant'Agostino (1270). The façade has maintained the original rose window and the gate, while the single nave interior is a Baroque restoration.
• Chiesa di San Biagio (11th century) is the oldest church of the city. It has a bell tower and it's always opened on 3 February for the anointing of the throat, a Catholic rite linked to the cult Saint Biagio.
• Torri Montanare, a relic of the ancient walls (11th century). They consist in two massive towers, the most recent dating to the 15th century, offering a panoramic view of the area.
• Porta San Biagio (11th century), the only one gate remaining of the nine once existing
• Torre civica (19th century) was built over a pre-existing tower next to the cathedral. Nowadays it is a belfry and a clock tower.
• Torre Aragonese (15th century) was a tower along the ancient walls.
• Palazzo dell'Arcivescovado (16th century) is still the seat of the archbishop and houses a diocesan Museum.
• Botteghe medievali was a house built in 1434. It has two floors and on the ground floor there are antique shops, with external bank according to the Roman use.

Vasto

The old part of the town (centro storico) features a number of interesting buildings and churches dating from the 12th to the 18th century, including:

• Cathedral of San Giuseppe
• Santa Maria Maggiore: largest and oldest church in the town, mentioned in a document as early as 1195, with a tall bell tower. Damaged by the Turks in 1566,^[7] and by a fire in 1645, it went a thorough restructuring in 1735 in which it got the current shape. It hosts one of alleged Jesus' crown of thorns (Sacra Spina).
• Castello Caldoresco
• D'Avalos Palace [it], which houses four museums, called Musei di Palazzo d'Avalos [it]^[8][9]

Below the hill on which the town is located, the beach resort town of Marina di Vasto offers a large sandy beach and several hotels and other facilities.

Further north the coast becomes rocky and features interesting pebble and stone beaches and coves, as well as the typical trabocchi, that are typical wooden fishing machines of the Southern Abruzzo coast.
Amongst the most interesting natural areas, also featuring a number of sandy and rocky beaches, is the protected natural area of the Riserva Naturale di Punta Aderci,^[10] whose beaches were voted in 2014 3rd of the top 20 beaches in Italy.^[11]

Ortona

The origins of Ortona are uncertain. Presumably, it was first inhabited by the Frentani, an Italic population. In 2005, during works near the Castle, a Bronze Age settlement was discovered, and the Roman town largely coincided with this first settlement. Some sections of paved roads and urban walls, as well as some archaeological findings are the only remains of this period. Ortona remained a part of the Roman Empire i.e., the Byzantine Empire for several centuries, before it was annexed by the Kingdom of the Lombards. In 803 the Franks incorporated Ortona into the county of Chieti. From that date on, the town remained tied to Chieti and its territory.

In 1258 the relics of the Apostle Thomas were brought to Ortona by the sailor Leone Acciaiuoli. In the first half of the 15th century its walls were built, and during this period Ortona fought with the nearby town of Lanciano in a fierce war that ended in 1427. On June 30, 1447, ships from Venice destroyed the port of Ortona; consequently the king of Sicily at that time commissioned the construction of a Castle to dominate the renovated port. In 1582 the town was acquired by Margaret of Parma, daughter of Emperor Charles V and Duchess of Parma. In 1584 Margaret decided to build a great mansion, known as Palazzo Farnese, which was never completed due to her death.

After the establishment of the Kingdom of Italy in 1860, Ortona became one of the first sea resorts on the Adriatic Sea. On 9 September 1943, the royal family of the House of Savoy left German-occupied Italy from the port of Ortona. The defensive Gustav Line was established by the Germans at Ortona, extending towards Cassino on the opposite side of Italy. Ortona offered the Allies a supply port on the Adriatic and was fiercely defended by the Germans attracted the attention of that the international press in the struggle between the German paratroopers and the 2nd Canadian Infantry Brigade. This led to this battle being known as "Little Stalingrad".

Guardiagrele

The biggest church in Guardiagrele is Santa Maria Maggiore of which it has been written:^[12]

The façade presents a splendid 14th-century gothic portal, among the most elegant in the Abruzzi Gothic style. The Coronation of the Virgin sculpture group in the portal lunette is also magnificent, attributed to the school of Nicola di Guardiagrele. Under the colonnaded portico, next to the lateral door, is the splendid fresco by Andrea De Litio (1473) portraying Saint Christopher. In the interior, completely rebuilt in the 18th century following an earthquake, crumbling stucco-work in the Baroque style and a shrine of the same period set off a 15th-century fresco representing the Madonna of the Milk.

In addition to Santa Maria Maggiore, there are several other churches and palazzi or mansions of various ages which are of architectural interest, including S. Nicola di Bari (founded in the 4th century), the convent of the Chapuchins (1599), Palazzo De Lucia (16th century), Palazzo Elisii (15th-18th century), the cloister of the Palazzo Comunale Piazza San Francesco (17th century) and Palazzo Marini (1391).

Museums include:

• Museo Civico (Civic Museum)
• Museo del Costume e della Tradizione della Nostra Gente (Costume and Folk Museum)
• Museo del Duomo ("Cathedral Museum"), in Santa Maria Maggiore
• Museo Archeologico ("Archaeological Museum")

Twin towns — sister cities

The province of Chieti is twinned with:

• Malmö Municipality, Skåne, Sweden^[13]