sentences:  Caccini was in close cooperation with Pietro Tacca and the rest of Giambologna's pupils in the prolonged cooperation over the bronze doors for Pisa Cathedral.Fragmentary antiquities were not to the sixteenth-century collectors' taste.Caccini produced a head for an antique torso, and a further, crouching figure to produce the "Bacchus and Ampelos" in the Uffizi, which was once attributed to Michelangelo.