Just as they pioneered new techniques of statecraft, the Italians city-states also sponsored Renaissance innovations in art and architect. In search of realistic depictions, Italian artists studied the human form and represented the emotions of their subjects.  Italian painters such as Masaccio, da Vinci relied on the technique of linear perspective to represent the three dimensions of real life on flat, two-dimensional surfaces.  Sculptors like Donatello and Buonarotti sought to depict their subject in natural poses that reflected the actual workings of human muscles rather than in the awkward and rigid postures found in other sculptures in their time. I really enjoyed your subject matter because these men were advance in their skill set and you would certainly want to include them in your time capsule for these reasons you have written of.