you can discover what people believe to be the oldest advertisement in the world. And it is probably not a coincidence that it was marketing the oldest profession. It points out to the Private House, a hidden (but not so secret) brothel. The carvings in the marble show a distinct image of a foot, together with an image of a cross, a heart, a woman, a purse, a library, and a hole in the rock. There are different interpretations of course, but in general, researchers agree that it has to be something along the lines of this: on the left at the crossroads, you can purchase women’s love. The footprint and the hole were a test to know if you were eligible to buy their love. If your foot was at least as big as the one carved into the marble, and you had enough coins to fill the hole, you were good to go. If not, then there was alternative and more enriching entertainment at the library.That description and photo, along with others in this post, came from this site, which bills itself "The Ultimate Ephesus Guide" and certainly has a claim to be what it says. If you are considering a trip to the site I highly recommend it.