A holy terror

In the summer of 1520, Michelangelo Buonarotti wrote a letter of recommendation on behalf of his protégé, the painter Sebastiano del Piombo, to Cardinal Bibbiena, an influential figure at the court of Pope Leo X. The testimonial carried some weight, for Michelangelo was by now Italy’s most admired sculptor, with what are nowadays called ‘signature achievements’ such as the David, the Pietà and the Dying Slave to his credit.