This is photograph of the Colosseum. Which of the following aspects of architecture are not a part of this construction?

a.

the three Greek orders (columns)

c.

crenellation

b.

arches

d.

post-and-lintel system

The correct answer is c. crenellation. The Colosseum has all three Greek orders (Doric, Ionic, and Corinthian) in its columns, it has many arches (think semicircular openings), and it has a post-and-lintel system (in which vertical elements - - like columns - - hold up horizontal elements, with large spaces between these two elements - - like arches). However, the Colosseum does not have crenellation, which is a battlement often seen on castles. A crenellation is a low protective wall on the roof of a building, with repetitive, squared openings from which people could shoot intruders.