To begin with, the account books of the Carmine show that Fra Filippo remained at that monastic establishment at least until 1431, when he was about twenty-five years of age. That even then he did not throw off his clerical habit is clearly proved by the fact that he subsequently held the posts of abbot of S. Quirico a Legnaja, and of chaplain to the nuns of Sta. Margherita at Prato. Of the early frescoes recorded by Vasari and other writers, every vestige has disappeared, so that it is impossible to trace through them the supposed direct or indirect teaching of Masaccio. But there is something wrong about the dates. Masaccio wrought his Carmine frescoes between 1425 and 1427, so that his could not possibly have been the earliest influence upon the young monk's impressionable mind. Nor is there even a hint of Masaccio's monumental style in the earliest known works by Filippo: the two "Nativities" in the Florence Academy, and the "Annunciation" in the Pinakothek in Munich. That Fra Filippo, like all the masters of the Florentine Renaissance, was, in his later life, powerfully influenced by the genius of Masaccio, is only natural, and cannot be doubted by anybody who has seen his frescoes at Prato. For his earliest inspiration, however, one has to look for other sources; and modern criticism is pretty well agreed upon this point, that the pictures painted by the friar in his youthful years are based on the trecento tradition, and that the only late Giottesque who could have been his master is the Camaldolese, Lorenzo Monaco.