it would seem that the term "art master" would be upgraded in the modernism era. personally, i don't believe the role itself had changed, but rather the ideas of art and artists themselves. of course, as centuries pass by styles and techniques (overall ideas of art[ists]) are going to evolve, leaving the once renowned and famous in last seasons discount bin. the mass industrialization and urbanization of the nineteenth century continued to flourish and expand from textiles, steam and iron to steel, electricity, chemicals, and oil. the discovery of these new found industries caused the number and size of western cities to grow immensely. people migrated mainly because of the employment opportunities these innovations provided, but also because of improved health and living conditions that these larger cities acquired. surely we have all noticed by now that people (as a whole) evolve and grow, their (our) culture does as well. and though we still may look to the past for ideas and/or inspiration, someone will always come along and achieve something no one else has.
enter modernism. modernism gave the green light for artists to express themselves as individuals, instead of just commissioning works for religious, political, or wealthy parishioners. now artists had free reign to create works based on the internal world, not just the external.
and as the centuries went (and goes) by the art movement continued (s) to change and what we consider art now, would never have passed then.