Lucius Cornelius Balbus was Julius Caesar's chief engineer for a time, so he could well have had a wall - somewhere. He had a nephew of the same name who also achieved some fame but was not involved with engineering - though he did have a theatre built in Rome.

This thread took me back to dreary Latin lessons with flies droning around sleepy hot rooms. "Balbus listened to the sweet voices of the girls singing" and all that. We had an atrocious Latin master and a highly effective French mistress (now, now, no sniggering at the back there). Probably accounted for my exam results being what they were!