chiquita:  Donatello was very passionate about reintroducing Humanism into the Renaissance and thus sculpted major iconic figures that were commissioned by powerful and wealthy patrons.  These sculptures, along with David, included:  his equestrian statue of Erasmo-- the "Gattamelata", his bronze crucifix, and the "Madonna with Child", all commissioned and placed in the Basilica of St. Anthony among many of his other artwork.  He also sculpted "Prophet Habacuc," "St. Mark," and "The Feast of Herod," just to name a few!