Jacopo Colonna or Giacomo Fantoni (died 1540) was an Italian sculptor active in the Renaissance.
Born in Venice, he was a pupil of Jacopo Sansovino.
He completed a St Jerome statue for the church of San Salvatore, a weeping Christ now in the Gallerie dell'Accademia of Venice.
He was commissioned by Luigi Cornaro, stucco depictions of Minerva, Diana, and Venus, as well as a statue of Mars.
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