For Italian artist Frederico Pietrella, time is a framework that can be measured in the time it takes to create a work of art. And one of the mediums he uses to illustrate the concept of time is a library date stamp. As his large-scale images take a considerable amount of time to produce, he will change the stamp to reflect the current date, adding texture to illustrate his everyday images in a complex, pointillistic manner. Each image can take him up to two months to complete, and they often sell for up to €20,000 (or $26.000).Pietrella, who now makes...