<span>Sainte-Chappelle, Paris or Aachen Cathedral, Germany
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There are more, but here the ones that I know of
I think it would be the aspect of realism
The Music Industry is containing and composing of not only companies but also individuals that making money by writing new pieces of songs, selling live shows and concerts, audio and video recordings and compositions of sheet music. These people called songwriters and composers, musicians, recorders, bandleaders, publishers, and producers, and etc.
But the companies that will be going to create, produce and distribute its musical scores are the Music Publishing companies.
The apse or the front of the congregation.