Along the way of the dinosaurs

Aosta (UK: , US: , Italian: [aˈɔsta] (listen); French: Aoste [ɔst], formerly Aouste; Arpitan: Aoûta [aˈuta], Veulla [ˈvəla] or Ouhta [ˈuhta]; Latin: Augusta Praetoria Salassorum; Walser: Augschtal; Piedmontese: Osta) is the principal city of Aosta Valley, a bilingual region in the Italian Alps, 110 km (68 mi) north-northwest of Turin.

The Arch of Augustus (in French Arc d'Auguste) is a monument in the city of Aosta, northern Italy.It was erected in 25 BC on the occasion of the Roman victory over the Salassi and was the work of Aulus Terentius Varro Murena.It is located at the end of the decumanus maximus, a little distance from the Bourg Saint-Ours (quarter of the Collegiate Church of Saint Ursus) and from the eastern entrance of the city wall (the Porta Prætoria).

Aosta railway station (Italian: Stazione di Aosta; French: Gare d'Aoste) is the main station serving the city and comune of Aosta, in the autonomous region of Aosta Valley, northwestern Italy. Opened in 1886, it forms part of the Chivasso–Ivrea–Aosta railway, and is also a junction station for a branch line to nearby Pré-Saint-Didier, in the Valdigne, on the way towards Courmayeur.

Aosta Cathedral (Italian: Cattedrale di Aosta; Cattedrale di Santa Maria Assunta e San Giovanni Battista; French: Cathédrale d'Aoste; Cathédrale Notre-Dame-de-l'Assomption et Saint-Jean-le-Baptiste) is a Roman Catholic cathedral in Aosta, in north-west Italy, built in the 4th century. It is the episcopal seat of the Diocese of Aosta.

Piazza Émile Chanoux is a city square in Aosta, Italy.

The Roman Theatre is an ancient building in Aosta, north-western Italy.It was built in the late reign of Augustus, some decades after the foundation of the city (25 BC), as testified by the presence of pre-existing structures in the area. There was also an amphitheatre, built during the reign of Claudius, located nearby.

Sant'Orso, or Saint-Ours, is a collegiate church in Aosta, northern Italy, dedicated to Saint Ursus of Aosta. The original church had a single hall, delimited by a semicircular apse. It was entirely rebuilt during the 9th century, during the Carolingian age. Later, bishop Anselm of Aosta further renovated the church, introducing a basilica plan with three naves with wooden trusses.

The Leper’s Tower is a tower located at the north-west corner of the Roman wall of Aosta, on the rue Jean-Boniface Festaz.

The Italian Catholic Diocese of Aosta (Latin: Dioecesis Augustana) has existed in its modern form since 1817. It is a suffragan of the Archdiocese of Turin.