The exterior of the Colosseum combined the Greek post-and-lintel structure of columns and entablature with what Roman form?

A) Groin vault
B) Podium
C) Caldarium
D) Arch

Lost Wax

A method of metal casting in which a molten metal is poured into a mold that has been created using a wax model, which is then melted away and lost.

Repoussé

Formed in relief by beating a metal plate from the back, leaving the impression on the face. The metal sheet is hammered into a hollow mold of wood or some other pliable material and finished with a graver. See also Relief.

Drilling

The process of making holes in a solid substrate by using a rotating tool called a drill, often used in construction, manufacturing, and resource extraction.