If you like live theater, book yourself a seat for a play or other stage show at Teatro Amintore Galli. Check online to see what's still available.
If you're staying a while in Rimini Historic Center, Teatro Amintore Galli is a good place to start your sightseeing. This arts and culture attraction is one of many attractions that'll keep you on the hop here. Italy in Miniature, Piazza Cavour, and Tempio Malatestiano are also waiting to be discovered close by.