The Catholic Arts are mostly base their arts in the bible and about their religion while the Protestant art rejected mostly of the arts from catholic arts and create a simpler and new way of arts. They depict it because they want to be different from the catholic and its also because of the reformation!
A Much wider than because if the fabric is wider than the pattern then it is likely your dress will not come out correctly.
We study art for many things; culture, history, determining value, studying religions.
You need to provide what area you live at.