Portraits of Aphrodisian citizens which had decorated the top of the Portico Tiberius. Each of them was been made by a different sculpturer. So you can see there quite professional ones but also some quite amateur ones.
This is apparently a different version of the photo I took, but with colors far more vivid. I should have worked with the version I posted in order to replicate these colors. Here, however, the "knee" of the falls does not show up on the right.