The Romans didn’t use zero as a mathematical notation. But, with an abacus you can still build:

@Bumbles must be a tricky thing to master. I reckon I could do it, I used to be able to use a slide rule. I'm not sure I have the patience though!

@SpudMuffin I got as far as pre-calc, and struggled for a B. I’d be lost.

@Bumbles hopefully you won't be asked to build a basilica, or an aqueduct!

@JoyfulSilence I’m pretty sure the Coliseum is a singularity.

@Bumbles

Or the oculus in the Pantheon in your image.