What marked a new, more complex and symbolic approach to christian art?

The Rabbula Gospels. 
The Rabbula Gospels, or Rabula Gospels, (Florence, Biblioteca Mediceo Laurenziana, cod. Plut. I, 56) is a 6th-century illuminatedSyriac Gospel Book. One of the finest Byzantine works produced in Asia, and one of the earliest Christian manuscripts with large miniatures, it is distinguished by the miniaturist's predilection for bright colours, movement, drama, and expressionism. Coming from a period from which little art survives, and which saw great development in Christian iconography, the manuscript has a significant place in art history, and is very often referred to.

Good patients tbh with you

Well, in the music industry during the 80s  cyndi lauper took a risk in changing a certain type of music art into something creative with her hair dye and wild hairstyles that were bold, her style was entice and screeching that she actually did her get a lot of hate for it because at that time hair dye and crazy patterns wasn't the norm girl's just wanna have fun for example that changed the work of her genre and a lot of people were influenced by her ways. there was other people who took the dare but not a lot. that itself refers to change in art style, because modern times changed.