Each stone is supported by learning on the keystone in the centre. It differs from the post and lintel primarily in that it can span greater areas without support.

It helped maintain the support without adding weight to the wall. It made possible thinner walls and more windows. What is this?

Greeks developed many styles of columns and gave names to the part. What do you call this?

The following are orders of architecture developed by the Greeks. Which is NOT included?

It is the intersection of two barrel vaults. The intersection makes additional strength possible with less foundational support. What is this?

It is simply a series of arches which forms a continuous covering. This development allowed the use of the arch as a passageway rather than just an opening in a wall. What is this?

It comes from the Italian word duomo, meaning cathedral derived from the Latin word domus meaning house. What is this?

It is is uniquely suited to steel because unsupported steel beams can be extended farther without sagging than any other material. What type of construction is this?