One way that the Romans were able to create larger interior spaces in their architecture than the Greeks is by the use of concrete, which is lighter, stronger, and less expensive than marble. The Romans also became very skilled at the construction of bricks, which are also stronger and less expensive than marble.
Because concrete is lighter than marble, concrete buildings do not require as much interior support (e.g., columns) to hold them up. Fewer columns or interior support structures mean more interior space.
I got this information from: https://www.enotes.com/homework-help/why-were-romans-able-create-larger-interior-spaces-445813
The context of this sculpture is important, because it is actually based off of a goddess name Nike; hence the name. Nike of Samothrace was created to honor the goddess Nike and commemorate a sea battle.
Op art designs are usually geometric patterns used to create an illusion. Im not really sure what you mean by "how say two artists that drow these things"
