We are talking about a painting from an artist in the court of a Spanish monarch from hundreds of years ago, a type of art that museums strive to maintain via expensive means. We are not talking about more ephemeral art that doesn’t get maintained, and is eventually lost to time anyway.
Maintaining of art like this would absolutely be one of the first things to go. There is already often talks about defunding the arts even in peaceful times. Look at “went to an art school” being often thrown around as a joke about being useless even in decent times.