The Martyrdom of St. Peter and St. Paul, c. 1527-1530/1531. The workshop of Parmigianino was one of the chief centers of chiaroscuro printmaking in the 1500s. Antonio da Trento, Parmigianino's student in Bologna from 1527 to 1531, made several chiaroscuro prints after his master's drawings. This print, considered da Trento's first collaborative effort with Parmigianino, was based on a drawing executed in Rome between 1524 and 1527 for a potential papal commission.