Conversation so far:
What do art historians mean by animal style art?
Animal style art is an approach to decoration found from China to Northern Europe in the early Iron Age, and the barbarian art of the Migration Period
What did this mean to the people making the animal style art?
After Christianization, Migration Period art developed into various schools of Early Medieval art

Question: What was the styles called
Self-contained rewrite: What was the styles called after Migration Period art developed into various schools of art?