Roman Style Crossword

A structure used to transport water.
Uses a "keystone" to lock in place.
Used to lighten the load of heavy ceilings.
A ________ vault is like a tunnel.
A________ vault is formed when two vaults cross.
A series of bi-secting arches that spane a space.
Romans used hyper-realism in this artwork.
Tiles or glass, set in mortar.
Romans invented this inexpesive building material.
It could seat 50-80,000 spectators.
A _________ arch commemorated an event.
The ultimate example of Roman architecture.
A type of wall art using paint and plaster.
Romans admired the art of the __________.
A city that was covered in ash, preserving the art.
A feature of both Greek and Roman temples.
They pre-date the Romans.
Common sculpture material.
A metal made from tin and copper.
A unique feature of the Pantheon.
One third of the Colosseum was destroyed by ________.
A material made from fired clay.
"Atmospheric perspective" creates this element in art.
Gravity strengthens an arch, but weakens a _________.
A theater "on all sides".