He created large bronze statues of saints Stephen, Matthew, and John the Baptist for the Or San Michele in Florence while he was still working on another project for which he had been chosen over six other artists, including Brunelleschi, in 1402.  
This artist's treatise, I Comentarii, published in 1447, gave a history of ancient art and discussed the author's admiration for certain painters of Siena.  He created large bronze statues of saints Stephen, Matthew, and John the Baptist for the Or San Michele in Florence while he was still working on another project for which he had been chosen over six other artists, including Brunelleschi, in 1402.  FTP, name this sculptor of the Gates of Paradise at the Baptistery of the Cathedral of Florence.
This artist's treatise, I Comentarii, published in 1447, gave a history of ancient art and discussed the author's admiration for certain painters of Siena.  
Lorenzo Ghiberti