A shot looking up usually makes a subject look more dominant

Which is an Islamic architectural decoration that appears as niche-like cells in the transition area of wall to dome, with many other decorative uses as well?

a. iwan b. madrasa c. mihrab d. muqarnas

Which music of the 6th century became a major part of Catholic Church services?

A) sonatas B) Gregorian chants C) concertos D) madrigals