And the evidence we find today says yes, they were. This is a picture of the site at Mohenjo-Daro in modern-day Sindh, Pakistan. And you can see how tight this brickwork is. Even by modern standards, this is quite good. You need to think how many things we would build would last 5,000 years in this good, being exposed to the environment. So they think this was a public bath. You see a citadel in the background.