It's no coincidence that the word "muse" appears in "museum!" Museo Internazionale della Fisarmonica aims to inspire, engage and educate visitors, so squeeze it into your itinerary.
When you've finished exploring this Castelfidardo museum, why not make your way to Basilica di Loreto, Leopardi House, and Sassi Neri Beach? They're not too far from Museo Internazionale della Fisarmonica and also a hit with many tourists.