What is the name for the specific type of high tower found on a mosque, particularly a mosque from the Middle Ages?

The three orders of classical Greek architecture that are still found in architecture today are ________________.

A statue of a small grotesque figure that adorns a gothic building is called __________.

In an arch, the central piece of masonry that allows all the pressure to be placed throughout the arch is called __________.

Flying buttresses were a common feature of church architecture in which style?

What is the key feature of Russian church architecture?