北宮殿

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.

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.

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.

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.