What significant change occurred in the nineteenth century in how art was conceptualized and created?

 The major changes that occurred in the 19th century in the way art was created and conceptualized was emergence of exhibition centers in major cities in the civilized world, where artworks would be displayed, the rise of art criticism which would be depicted in  illustration magazines, and the emergence of commercial arts brokers.

Louis xvi wanted to force aristocrats to pay taxes for the first time