Short answers, pulled from the story.
The inscription expresses a hope that bathers enjoyed their time safely within the facility. This phrase appears on mosaic signs from Sabratha in Libya alongside bathing sandals and strigils.
Varro defined balneum as a private bath or vessel owned by individuals of consequence. Cicero used this term for chambers containing baths within personal homes while Pliny the Elder utilized neuter plurae for public facilities.
The Baths of Caracalla were completed in 216 occupying a twenty-five hectare site covering thirty-three acres. Emperors constructed these massive complexes to display power while providing essential services to citizens.
Wealthy individuals brought slaves called capsarii who carried towels oils and strigils into the baths. These attendants watched over masters because thieves and pickpockets frequently frequented public facilities.
A circular furnace over ten feet in diameter heated water and poured hot air beneath floors through hollow bricks called tubuli. Three boilers stood behind the furnace each holding water at different temperatures for specific rooms.