Juliane Vogel's project compares two different models of circulation by focusing on how codified and uncodified poetic forms moved across territorial boundaries, taking the migration of tragedy in the seventeenth and eighteenth centuries in Europe as an example. Vogel investigates two corresponding groups of forms: uncodified English itinerant forms which moved through Europe with traveling troupes, i.e., mainly through improvisation and physical performance; and the codified forms with which classical tragedies originating in France were distributed by French traveling troupes, who performed works that were composed according to strict poetic rules, fixed in writing, and backed by the courts and academies. Codified forms are understood as rule-based and moving within stable coordinates and institutions, while uncodified forms are understood as unstable, flexible, and subject to modification and change.