Over the obverse from the coin, as an alternative to devices There may be architecture, and 1 more grand instrument. You can find an artist’s illustration of the balcony from the Musikverein Live performance Hall, often called the Golden Corridor. Standing upon it's the corridor’s well known pipe organ. Again https://alexismhqpp.blogvivi.com/27254448/austrian-gold-philharmonic-coin-1-oz-for-dummies