Under the patronage of the extravagantly wealthy and most powerful Cardinal Scipione Borghese, the young Bernini rapidly rose to prominence as a sculptor. Among his early works for the cardinal were decorative pieces for the garden of the Villa Borghese, such as "The Goat Amalthea with the Infant Jupiter and a Faun". This marble sculpture (executed sometime before 1615) is generally considered by scholars to be the earliest work executed entirely by Bernini himself. Among Bernini's earliest documented work is his collaboration on his father's commission of February 1618 from Cardinal Maffeo Barberini to create four marble "putti" for the Barberini family chapel in the church of Sant'Andrea della Valle, the contract stipulating that his son Gian Lorenzo would assist in the execution of the statues. Also dating to 1618 is a letter by Maffeo Barberini in Rome to his brother Carlo in Florence, which mentions that he (Maffeo) was thinking of asking the young Gian Lorenzo to finish one of the statues left incomplete by Michelangelo, then in possession of Michelangelo's grandnephew which Maffeo was hoping to purchase, a remarkable attestation of the great skill that the young Bernini was already believed to possess.