Answer:
Three carved panels that can be opened and shut.
During this time in the Romantic Era, the umbrella term "classical music" began to be accessible for all people and not just the group of elitist social upper class. A more diverse group of people started to attend concerts.
I addition to this, there were more woman composers. Woman not only started to write music but also started to perform and teach music as well. Some of these women include Fanny Mendelssohn and Anna Maria Mozart
In the Romantic Era, there was a deep sense of nationalism as well. There was pride in homeland and traditions embedded in music including folk songs and dances.
To explain ethics of examples and teach about a topic and lastly to entertain thoses without tv
The answer to this question is jazz rock
