 In this module, we learned about marble, marble being one of the most famous, most recognizable geological materials used in art history and probably something that each of us can picture when we close our eyes, beginning its life as a humble limestone. And then, after undergoing the strain of being squeezed during mountain growth, developing those nice, well-formed sugary calcite crystals, either in the very pure white, blindingly white sometimes form or in the elegantly streaked silver-gray graphite-bearing version of the marble is something that we see in sculptures, it's something that we see in architecture. You may have some on your countertop or in your local cemetery, something that most of us are familiar with and have a chance to see on a regular basis. So the next time you're walking through your kitchen or past the local church or bank and you notice a marble, take a minute to think about the use of this marble throughout history and how that ease of use and the availability of large quantities of marble and that just sort of beauty of the work material has come to be represented throughout history up until continuing into modern times. So I hope that you also have a good appreciation of how this material was cut and drilled and worked. You've seen some modern tools, you've seen some ancient tools, and also had the chance to explore some of the characteristic marks of different techniques. One of the things that of course the Romans developed was, well even the Hellenistic Greeks, was a technique of drilling into marble and taking advantage of this pure pristine whiteness and then introducing areas of shadow with really deep drill work. And that's something that makes the art of the Hellenistic period so very interesting. And we see the Romans playing with those techniques as well. So I hope that if nothing else, this gets you to your local art museum at some point. And you'll spend a little bit of time maybe looking at a Roman portrait head that you would have walked past before and look for those tool marks, look for marks of different types of points and chisels and think about sort of the controlled workmanship of the artist in that process.