Marble statues, possibly representing Saints Ambrose, Jerome, Augustine and Gregory, the Doctors of the Church, realized for the original facade of the Cathedral by Niccolò di Pietro Lamberti and Pietro di Giovanni Tedesco between 1395 and 1401, on a design by Agnolo Gaddi. These statues from the original facade of the Cathedral are traditionally identified as the four great Doctors of the Western Church. Records from 1395 show that the master builder of the time had ordered four large blocks of marble for their execution and the painter Agnolo Gaddi venne had been paid to make drawings for the four figures. Piero di Giovanni was commissioned to sculpt Saints Jerome and Ambrose, while Niccolò di Pietro Lamberti was entrusted with the statues of Saints Augustine and Gregory. After the demolition of the first facade in 1587, the statues were transformed as we see them today, into ancient poets or philosophers, with laurel wreaths on their heads and books in their hands and were placed to adorn the avenue of the Medici Villa of Poggio Imperiale.