Aosta packs more Roman monuments into its compact historic centre than any city north of Rome. Founded in 25 BC as Augusta Praetoria, the city preserves its original grid plan, city walls, two main gates, a 4,000-seat theatre, and the Arch of Augustus, all within a 15-minute walk of one another. Beyond the Roman core, Aosta serves as a base for skiing at Pila, castle-hopping through the Aosta Valley, and hiking in Gran Paradiso National Park, Italy’s oldest national park. Here are the top things to do, organised by category.
Roman Ruins and Ancient Monuments in Aosta
Arch of Augustus (Arco di Augusto)
Built in 25 BC to celebrate Rome’s victory over the local Salassi tribe, this single-arch monument stands at the eastern entrance to the old city on Piazza Arco d’Augusto. The arch is built of local puddingstone and originally supported a gilded bronze statue of Emperor Augustus. It is free to visit 24/7 and floodlit at night. The nearby Roman bridge (Ponte Romano), a single-arch stone span over the Buthier River, dates from the same period and is still partly intact. Both are on the eastern edge of the pedestrian zone, 300 metres from the train station.
Roman Theatre (Teatro Romano)
The theatre’s 22-metre-tall southern facade is the most photographed Roman structure in Aosta. Built during the reign of Augustus and expanded under Claudius, it held 3,000-4,000 spectators across three tiers of seating. Only the stage wall and lower cavea survive, but the scale is impressive. Entry costs EUR5 (combined ticket with the MAR museum is EUR8) and it is open daily 10:00-18:00 (until 19:00 in July and August). The theatre sits on Via Porta Pretoria, 100 metres north of Piazza Chanoux.
Porta Praetoria
The eastern gate of the Roman city wall, Porta Praetoria is the best-preserved Roman gate in northern Italy. Built in 25 BC with three arched passageways (the central one for vehicles, flanking ones for pedestrians), it still shows the grooves worn by chariot wheels in the stone paving. The gate is free and open-air, forming the eastern entrance to the pedestrianised Via Sant’Anselmo. The Roman city walls extend north and south from the gate; follow them for 10 minutes in either direction to see well-preserved sections with medieval towers built on top.
MAR – Regional Archaeological Museum
Housed in a former convent on Piazza Roncas, the MAR displays artefacts from Aosta’s Roman, early Christian, and medieval periods. Highlights include the bronze “Balteus” ceremonial belt from the 1st century AD, a reconstructed Roman kitchen, and the underground cryptoporticus (covered walkway) from the Roman forum. Entry is EUR5 (EUR8 combined with the theatre), open Tuesday to Sunday 10:00-18:00. Budget 60-90 minutes. Address: Piazza Pierre-Leonard Roncas 12.
Churches and Medieval Architecture in Aosta
Aosta Cathedral (Cattedrale di Santa Maria Assunta)
The cathedral’s Romanesque core dates from the 11th century, with a Gothic facade added in the 16th century. Inside, the 11th-century frescoes in the apse and the 12th-century cloister with carved capitals depicting biblical scenes are the standout features. The treasury museum (Museo del Tesoro, EUR3) holds illuminated manuscripts from the 11th to 15th centuries and a 4th-century ivory diptych of Emperor Honorius. The cathedral is on Piazza Giovanni XXIII, open daily 7:00-12:00 and 14:30-19:00. Free entry to the cathedral itself.
Collegiate Church of Sant’Orso
Dating from the 5th century and rebuilt in the 11th, Sant’Orso is famous for its 12th-century Romanesque cloister with 42 carved marble capitals depicting scenes from the Old and New Testaments, the life of Saint Orso, and fantastical beasts. The adjacent priory (Priorato di Sant’Orso) has 15th-century frescoes. The church sits on Via Sant’Orso in the northern part of the old town, free to enter, open daily 9:00-17:30. The cloister costs EUR3. The church’s crypt contains early Christian sarcophagi from the 5th century.
Outdoor Activities near Aosta
Pila Ski Resort
Pila is one of the few Alpine ski resorts reachable directly from a city centre by cable car. The Aosta-Pila gondola station is a 5-minute walk from the train station on Via Carrel. The 15-minute ride (EUR15 one-way, EUR25 round-trip in winter) delivers you to 1,800 metres with 70 km of pistes ranging from 1,800 to 2,700 metres. Pila’s north-facing slopes hold snow well, and the resort suits beginners through advanced skiers with 12 lifts. A day pass costs EUR41-47 depending on season. In summer, the gondola operates for hikers and mountain bikers (EUR12 round-trip) from late June through mid-September, with 15 km of downhill MTB trails.
Gran Paradiso National Park
Italy’s oldest national park (established 1922) covers 703 square kilometres south of Aosta and protects the ibex population that almost went extinct in the 19th century. The park entrance at Cogne is a 45-minute drive from Aosta (bus route Arriva 522, 50 minutes, EUR4.50). Day hikes from Cogne range from the easy 2-hour Valnontey loop (chance of spotting ibex and marmots) to the strenuous 7-hour trek to the Vittorio Sella Refuge at 2,584 metres. The park visitor centre in Cogne (Fondation Grand Paradis, EUR4) has a good ibex exhibition and trail maps. May through October are the hiking months; July and August can see afternoon thunderstorms by 14:00, so start early.
Courmayeur and Mont Blanc
Courmayeur, Italy’s premier Mont Blanc resort town, is a 35-minute drive from Aosta (SAVDA bus route 581, 55 minutes, EUR4). The Skyway Monte Bianco cable car (EUR55 round-trip, open year-round except three weeks in November) rises from 1,300 metres at La Palud to 3,466 metres at Punta Helbronner in two stages, offering a terrace with panoramic views of Mont Blanc, the Matterhorn, and Monte Rosa. At the top, the 360-degree viewing platform and crystal museum are included in the ticket. Courmayeur itself has a car-free pedestrian centre with high-end shops and restaurants that are considerably more expensive than Aosta. Budget EUR80-120 for a two-course lunch with wine at a mid-range Courmayeur restaurant.
Aosta Valley Castles
Fénis Castle (Castello di Fénis)
The most complete medieval castle in the Aosta Valley, Fénis sits 13 km east of Aosta (bus line 110, 20 minutes, EUR2.50). Built in the 14th century by the Challant family, its double defensive walls enclose a pentagonal keep with frescoed courtyards and a chapel with 15th-century paintings by Giacomo Jaquerio. Entry is EUR10, open Tuesday to Sunday 10:00-13:00 and 14:00-17:00 (until 18:00 April-September). The castle appears on most Aosta Valley postcards and the inner courtyard fresco of Saint George and the dragon is the most photographed interior detail. Combine with Issogne Castle 10 km further south for a full day of castle touring.
Issogne Castle (Castello di Issogne)
Unlike the military-looking Fénis, Issogne is a Renaissance residence (late 15th century) built by the same Challant family. Its courtyard features a famous wrought-iron fountain in the shape of a pomegranate tree, and the ground-floor portico is covered in frescoes depicting scenes of daily life: a guardroom, butcher’s shop, tailor, and market stalls. This is one of the best-preserved examples of late-Gothic secular fresco in the Alps. Entry EUR8 (combined EUR15 with Fénis), open same hours as Fénis. Bus line 110 continues past Fénis to Verres, then switch to line 344 for Issogne (check schedules; infrequent on Sundays).
