Wiener Opernball 2026 (Vienna)Vienna’s most famous ball returns to the State Opera for one of the peak nights of the season. The event includes a costume competition, children’s specials and party options across the city centre. The 2026 theme is “the Romans”, and the listing promises live music, a DJ, tombola and a live draw for main prizes. AdvertisementIf you want to see a carnival parade without the scale of a major city centre, Hallein offers a lively but manageable version. After the parade, the city centre shifts into party mode, with a prize-giving for the best costumes and floats and events continuing into the night.